Engine deterioration test method, device, electronic equipment and storage medium

Abstract

The application relates to an engine degradation test method, device, electronic equipment and storage medium, which comprises the following steps: controlling the engine to run at a first speed and a corresponding first load for a first time length, run at a low idle speed for a second time length, keep stopping for a third time length, acquire a measured value corresponding to a first test parameter, and determine that a first test power is less than or equal to a preset first rated power threshold; running at a second speed and a second load, acquiring a measured value corresponding to a second test parameter, and determining that a second test power is less than or equal to a preset second rated power threshold; running at a third speed and a third load, acquiring a measured value corresponding to a third test parameter, and determining that a third test power is less than or equal to a preset third rated power threshold; comparing the above parameters with preset general test condition parameter theoretical values and limit specification parameter theoretical values respectively to obtain an engine degradation test result.

Description

Technical Field

[0001] This invention relates to the field of engine testing technology, specifically to an engine degradation testing method, apparatus, electronic equipment, and storage medium. Background Technology

[0002] Currently, the logistics industry widely uses heavy-duty commercial vehicles equipped with diesel engines. These vehicles commonly experience hot shutdowns after high-speed, high-load operation (e.g., when a driver stops at a service area to refuel or rest after prolonged high-speed driving on a highway). Under these conditions, the engine abruptly switches from a high-speed, high-load operating state to a shutdown state. Since the engine generates significant heat during high-speed, high-load operation, and the engine's cooling and lubrication system operates at a high load, the sudden shutdown causes the oil pump, water pump, and fan to cease functioning. This results in a sudden and significant reduction in the cooling and lubrication intensity of the engine's moving parts, leading to a sudden and significant decrease in the thickness of the oil film on the surfaces of these moving parts, and further reducing the oil film thickness in the engine combustion chamber. The coolant flow rate in the cylinder head nose area will also suddenly decrease significantly, which poses a significant challenge to the reliability of the engine's intake and exhaust systems, piston power cylinder system, valve train, and engine gaskets, thus affecting the overall engine reliability. The standard vehicle reliability tests during the development of this type of vehicle lack specific hot shutdown verification tests, and the current standard vehicle reliability tests have extremely limited verification effect for this operating condition. At present, engine manufacturers also generally lack corresponding specific hot shutdown bench verification tests. Therefore, it is necessary to design an engine hot shutdown degradation test method to verify the reliability and durability of the engine after hot shutdown under extreme thermal and mechanical load conditions. Summary of the Invention

[0003] In view of this, it is necessary to provide an engine degradation test method, apparatus, electronic equipment and storage medium to evaluate the durability of an engine under extreme thermal and mechanical load conditions.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] In a first aspect, the present invention provides an engine degradation test method, comprising:

[0006] S110. Control the engine to run for a first duration at a first speed and a first load, run for a second duration at a low idle speed, and remain stopped for a third duration, and obtain the measured value corresponding to the first test parameter; the low idle speed is the engine's idle speed when it is not under load;

[0007] S120. After obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, the engine is controlled to run for a first time at the second speed and the second load, run for a second time at low idle speed, and remain stopped for a third time, and the measured value corresponding to the second test parameter is obtained.

[0008] S130. After obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, the engine is controlled to run for a first time at the third speed and the third load, run for a second time at low idle speed and remain stopped for a third time, and the measured value corresponding to the third test parameter is obtained.

[0009] S140. The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results.

[0010] Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve.

[0011] Furthermore, before S110, which involves controlling the engine to run for a first duration at a first speed and a first load, to run for a second duration at a low idle speed, and to remain stopped for a third duration, the following steps are also included:

[0012] Control the engine to run without adding fuel until the engine oil pressure reaches a first preset value;

[0013] After fuel is added to the engine, the engine is controlled to run sequentially at low idle speed for a fourth time, at high idle speed for a fifth time, at low idle speed for a sixth time, at high idle speed for a seventh time, and at rated power for an eighth time; the high idle speed is the highest speed of the engine at maximum throttle and without load;

[0014] Control the engine to rotate backward until the engine's backward torque reaches a second preset value;

[0015] The engine is controlled to operate at maximum torque for a ninth duration;

[0016] The engine is rotated backward until the engine speed reaches a third preset value;

[0017] After controlling the engine speed to run at the third preset value for ten hours, it runs at low idle speed for eleven hours.

[0018] Control the engine to stop.

[0019] Furthermore,

[0020] Step S110 is executed repeatedly for n1 hours, where the value of n1 is in the range of [482, 500].

[0021] Step S120 is executed repeatedly for n2 hours, where the value of n2 is in the range of [482, 500].

[0022] Step S130 is executed repeatedly for n3 hours, where the value of n3 is in the range of [482, 500].

[0023] Furthermore,

[0024] The first test parameters include: theoretical values ​​of engine fuel consumption rate and theoretical values ​​of engine rated speed;

[0025] The second test parameters include: the theoretical value of engine fuel consumption rate and the theoretical value of engine maximum torque speed;

[0026] The third test parameters include: theoretical values ​​of engine fuel consumption rate, theoretical values ​​of engine maximum cylinder pressure, and theoretical values ​​of engine speed.

[0027] Furthermore,

[0028] The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter respectively include: measured values ​​of engine intake air temperature, engine intake resistance, engine coolant outlet temperature, engine exhaust pipe pressure, and engine fuel temperature.

[0029] The preset general test condition parameters include the following theoretical values: engine intake air temperature, which ranges from [22℃ to 28℃]; engine intake resistance, which ranges from [-4.7Kpa to -2.7Kpa]; engine coolant outlet temperature, which ranges from [99℃ to 131℃]; engine exhaust pressure, which ranges from [35.46 mm Hg to 40.54 mm Hg]; and engine fuel temperature, which ranges from [38℃ to 42℃].

[0030] Furthermore,

[0031] The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter respectively include: the measured value of the engine oil pressure at rated speed, the measured value of the engine cylinder coolant pressure at rated speed, the measured value of the engine coolant outlet temperature, the measured value of the engine turbine inlet temperature, the measured value of the engine intercooler temperature, and the measured value of the engine intercooler pressure variation.

[0032] The preset limiting parameters include: the theoretical value of engine oil pressure at rated speed, the theoretical value of engine cylinder coolant pressure at rated speed, the theoretical value of engine coolant outlet temperature, the theoretical value of engine turbine inlet temperature, the measured value of engine intercooler temperature, and the theoretical value of engine intercooler pressure variation.

[0033] The preset theoretical values ​​of the restriction parameters are respectively set with corresponding theoretical values ​​for warning restriction, interruption restriction, and emergency restriction.

[0034] Furthermore,

[0035] The first rated power of the engine is the engine's indicated rated power, and the value range of the engine's indicated rated power is [350, 400].

[0036] The second rated power of the engine is the maximum rated power of the engine, and the maximum rated power of the engine has a value range of [390, 400].

[0037] The third rated power of the engine is the rated power of the engine governor at the sudden change point, and the value range of the rated power of the engine governor at the sudden change point is [375, 380].

[0038] Secondly, the present invention also provides an engine degradation testing apparatus, comprising:

[0039] The first control unit is used to control the engine to run for a first duration at a first speed and a first load, run for a second duration at low idle speed, and remain stopped for a third duration, and to obtain the measured values ​​corresponding to the first test parameters; the low idle speed is the engine's idle speed when it is not under load.

[0040] The second control unit is used to control the engine to run for a first duration at a second speed and a second load, run for a second duration at a low idle speed, and remain stopped for a third duration after obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, and to obtain the measured value corresponding to the second test parameter.

[0041] The third control unit is used to control the engine to run for a first duration at a third speed and a third load, run for a second duration at low idle speed, and remain stopped for a third duration after obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, and to obtain the measured value corresponding to the third test parameter.

[0042] The matching unit is used to compare the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results.

[0043] Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve.

[0044] Thirdly, the present invention also provides an electronic device for executing the program stored in the memory to implement the steps in an engine degradation test method as described in any of the above implementations.

[0045] Fourthly, the present invention also provides a non-transitory computer-readable storage medium for storing a computer program capable of implementing the steps in an engine degradation test method according to any of the above implementations.

[0046] This invention provides an engine degradation test method, apparatus, electronic device, and storage medium. S110: Control the engine to sequentially run at a first speed and a first load for a first duration, run at low idle speed for a second duration, and remain stopped for a third duration, and obtain the measured values ​​corresponding to the first test parameters. The low idle speed is the engine's idling speed without load. S120: After obtaining the measured values ​​corresponding to the first test parameters and determining that the engine's first test power is less than or equal to a preset engine first rated power threshold, control the engine to sequentially run at a second speed and a second load for a first duration, run at low idle speed for a second duration, and remain stopped for a third duration, and obtain the measured values ​​corresponding to the second test parameters. S130: After obtaining the measured values ​​corresponding to the second test parameters and determining that the engine's second test power is less than or equal to a preset engine second rated power threshold, control the engine to sequentially run at a third speed and a third load for a first duration, run at low idle speed for a second duration, and remain stopped for a third duration, and obtain the measured values ​​corresponding to the second test parameters. The engine operates for a first duration, then at low idle speed for a second duration, and remains stopped for a third duration, acquiring the measured values ​​corresponding to the third test parameters. S140: The measured values ​​corresponding to the first test parameters, the second test parameters, and the third test parameters are compared with the theoretical values ​​of preset general test condition parameters and limiting specification parameters to obtain the engine degradation test results. Here, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve. Compared to existing technologies, this invention proposes an engine degradation test method to evaluate the engine's durability under extreme thermal and mechanical load conditions. This method primarily simulates actual end-user usage scenarios by controlling the engine to operate at high speed and high load for a period of time followed by a hot shutdown. The measured values ​​of the high-speed, high-load operation at the corresponding stage are then compared with the theoretical values ​​of preset general test condition parameters and limiting specification parameters to obtain the engine degradation test results. Based on these results, the engine's durability under extreme thermal and mechanical load conditions is evaluated. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a flowchart illustrating an embodiment of an engine degradation testing method provided by the present invention.

[0049] Figure 2 An engine torque curve diagram of an embodiment of an engine degradation test method provided by the present invention;

[0050] Figure 3 This is a schematic diagram of the apparatus of an embodiment of an engine degradation test method provided by the present invention;

[0051] Figure 4 A schematic diagram of an embodiment of the electronic device provided by the present invention. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0053] In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0054] In this embodiment of the invention, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, apparatus, product or device that includes a series of steps or modules is not necessarily limited to those steps or modules that are explicitly listed, but may include other steps or modules that are not explicitly listed or that are inherent to such process, method, product or device.

[0055] The naming or numbering of steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical order indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effect can be achieved.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] This invention provides an engine degradation test method, apparatus, electronic device, and storage medium, which are described below.

[0058] Figure 1 A flowchart of an embodiment of an engine degradation test method provided by the present invention includes:

[0059] S110. Control the engine to run at a first speed and a first load for a first duration, run at a low idle speed for a second duration, and remain stopped for a third duration, and obtain the measured value corresponding to the first test parameter; the low idle speed is the engine speed when it is not under load; preferably, the first duration is 20 minutes, the second duration is 15 seconds, and the third duration is 9 minutes and 45 seconds, while controlling the engine to run at the first speed and the first load.

[0060] S120. After obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, the engine is controlled to run at the second speed and the second load for a first duration, run at low idle speed for a second duration, and remain stopped for a third duration, and the measured value corresponding to the second test parameter is obtained; preferably, the engine is controlled to run at the second speed and the second load at the same time.

[0061] S130. After obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, the engine is controlled to run at the third speed and the third load for a first duration, run at low idle speed for a second duration, and remain stopped for a third duration, and the measured value corresponding to the third test parameter is obtained; preferably, the engine is controlled to run at the third speed and the third load at the same time.

[0062] S140. The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results.

[0063] Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve.

[0064] Understandably, given the current lack of a dedicated hot shutdown bench verification test method, this invention provides a three-stage hot shutdown degradation test method to evaluate the durability of an engine under extreme thermal and mechanical load conditions. This method primarily simulates actual end-user usage scenarios by controlling the engine to operate at high speed and high load in a corresponding stage followed by a hot shutdown for a period of time. The measured values ​​of the corresponding stage's high-speed, high-load operation are then compared with the theoretical values ​​of preset general test condition parameters and limiting specification parameters to obtain the engine degradation test results. Based on these results, the engine's durability under extreme thermal and mechanical load conditions is evaluated.

[0065] Furthermore,

[0066] The first test parameters include: theoretical values ​​of engine fuel consumption rate and theoretical values ​​of engine rated speed;

[0067] The first test parameters of the engine were determined through a specific embodiment, as shown in Table 1:

[0068] Table 1

[0069]

[0070] It is understandable that the engine is controlled to run for a first duration at a first speed and a first load, then run for a second duration at a low idle speed, and finally remain stopped for a third duration, and the measured values ​​corresponding to the first test parameters are obtained.

[0071] The second test parameters include: the theoretical value of engine fuel consumption rate and the theoretical value of engine maximum torque speed;

[0072] The second experimental parameters were determined through a specific embodiment, as shown in Table 2:

[0073] Table 2

[0074]

[0075]

[0076] It is understandable that after obtaining the measured value corresponding to the first test parameter, the engine is controlled to start, enter the first speed and the first load, and it is determined that the first test power of the engine is less than or equal to 5% of the preset first rated power of the engine. Then, the engine is controlled to run for a first time at the second speed and the second load, run for a second time at low idle speed, and remain stopped for a third time, and the measured value corresponding to the second test parameter is obtained.

[0077] The third test parameters include: theoretical values ​​of engine fuel consumption rate, theoretical values ​​of engine maximum cylinder pressure, and theoretical values ​​of engine speed.

[0078] The third test parameters of the engine were determined through a specific embodiment, as shown in Table 3:

[0079] Table 3

[0080]

[0081]

[0082] It is understandable that after obtaining the measured value corresponding to the second test parameter, the engine is controlled to start, enter the second speed and the second load, and it is determined that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine. Then, the engine is controlled to run for a first time at the third speed and the third load, run for a second time at low idle speed, and remain stopped for a third time, and the measured value corresponding to the third test parameter is obtained.

[0083] Furthermore,

[0084] The first rated power of the engine is the engine's indicated rated power, and the value range of the engine's indicated rated power is [350, 400].

[0085] The second rated power of the engine is the maximum rated power of the engine, and the maximum rated power of the engine has a value range of [390, 400].

[0086] The third rated power of the engine is the rated power of the engine governor at the sudden change point, and the value range of the rated power of the engine governor at the sudden change point is [375, 380].

[0087] Furthermore,

[0088] Step S110 is executed repeatedly for n1 hours, where the value of n1 is in the range of [482, 500].

[0089] Step S120 is executed repeatedly for n2 hours, where the value of n2 is in the range of [482, 500].

[0090] Step S130 is executed repeatedly for n3 hours, where the value of n3 is in the range of [482, 500].

[0091] Specifically, step S110, which involves cyclically executing n1 hours, means firstly acquiring the first test parameters of the engine and simultaneously running it for a first duration at the first speed and the first load; secondly, controlling the engine to run at a low idle speed for a second duration; thirdly, controlling the engine to remain stopped for a third duration; and finally, acquiring the measured values ​​corresponding to the engine running at the first test parameters, and cyclically executing the aforementioned steps for n1 hours.

[0092] Step S120, which involves cyclically executing n2 hours, means that after obtaining the measured value corresponding to the first test parameter that has been cyclically executed for n1 hours and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, the engine's second test parameter is first obtained and the engine is run for a first duration at the second speed and the second load. Then, the engine is controlled to run at a low idle speed for a second duration. Next, the engine is controlled to remain stopped for a third duration. Finally, the measured value corresponding to the second test parameter is obtained and the aforementioned steps are cyclically executed for n2 hours.

[0093] Step S130, which involves cyclically executing n3 hours, means that after obtaining the measured value corresponding to the second test parameter after cyclically executing n2 hours and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, the engine's third test parameter is first obtained and the engine is run at the third speed and the third load for a first duration. Then, the engine is controlled to run at low idle speed for a second duration. Next, the engine is controlled to remain stopped for a third duration. Finally, the measured value corresponding to the third test parameter is obtained and the aforementioned steps are cyclically executed for n3 hours.

[0094] Understandably, this test involves a period of downtime after each stage of high-load operation. The test runs at different speeds and loads and includes hot shutdowns. The entire test lasts 1500 hours (including downtime) and consists of three distinct 500-hour periods, with a brief maintenance stop every 250 hours (recommended not to exceed 4 hours). The test process is continuous.

[0095] Figure 2 An engine torque curve diagram, provided by an embodiment of an engine degradation test method according to the present invention, includes:

[0096] Before S110, which controls the engine to run for a first duration at a first speed and a first load, to run for a second duration at a low idle speed, and to remain stopped for a third duration, further includes:

[0097] The engine is controlled to run without adding fuel until the engine oil pressure reaches a first preset value; preferably, the first preset value is 10 psi.

[0098] After fuel is added to the engine, the engine is controlled to run sequentially at low idle speed for a fourth time, at high idle speed for a fifth time, at low idle speed for a sixth time, at high idle speed for a seventh time, and at rated power for an eighth time; the high idle speed is the highest speed of the engine at maximum throttle and without load;

[0099] Control the engine to rotate backward until the engine's backward torque reaches a second preset value;

[0100] The engine is controlled to operate at maximum torque for a ninth duration; preferably, the ninth duration is 20 seconds.

[0101] The engine is rotated backward until the engine speed reaches a third preset value; preferably, the third preset value is 1000 rpm;

[0102] After controlling the engine speed to run at the third preset value for ten hours, it runs at low idle speed for eleven hours; preferably, the eleventh hour is 20 seconds.

[0103] The engine is controlled to stop; preferably, the fourth duration is 20 seconds; preferably, the fifth duration is 20 seconds; preferably, the sixth duration is 20 seconds; preferably, the seventh duration is 20 seconds; preferably, the eighth duration is 20 seconds; preferably, the third preset value is 1000 rpm, and the tenth duration is 20 seconds.

[0104] In a specific embodiment, the engine undergoes a break-in process by performing the following steps, as shown in Table 4:

[0105] Table 4

[0106]

[0107]

[0108] Understandably, before conducting engine degradation tests, the engine needs to undergo a break-in process, during which the engine power and torque are checked to ensure they meet the performance development target values.

[0109] Furthermore,

[0110] The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter respectively include: measured values ​​of engine intake air temperature, engine intake resistance, engine coolant outlet temperature, engine exhaust pipe pressure, and engine fuel temperature.

[0111] The preset general test condition parameters include the following theoretical values: engine intake air temperature, which ranges from [22℃ to 28℃]; engine intake resistance, which ranges from [-4.7Kpa to -2.7Kpa]; engine coolant outlet temperature, which ranges from [99℃ to 131℃]; engine exhaust pressure, which ranges from [35.46 mm Hg to 40.54 mm Hg]; and engine fuel temperature, which ranges from [38℃ to 42℃].

[0112] The general test conditions for the engine, determined in conjunction with a specific embodiment, are shown in Table 5:

[0113] Table 5

[0114]

[0115]

[0116] It is understandable that the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset general test condition parameters to obtain the engine degradation test results. The engine power and torque are checked to see if they meet the performance development target value requirements. The engine parts that are of particular concern in this test are: piston, piston ring, cylinder liner, camshaft, tappet, main bearing and connecting bearing, exhaust pipe, turbocharger, valve, valve seat, all gaskets, cylinder head, cylinder head gasket, and mechanical fuel pump connection device.

[0117] Furthermore,

[0118] The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter respectively include: the measured value of the engine oil pressure at rated speed, the measured value of the engine cylinder coolant pressure at rated speed, the measured value of the engine coolant outlet temperature, the measured value of the engine turbine inlet temperature, the measured value of the engine intercooler temperature, and the measured value of the engine intercooler pressure variation.

[0119] The preset limiting parameters include: the theoretical value of engine oil pressure at rated speed, the theoretical value of engine cylinder coolant pressure at rated speed, the theoretical value of engine coolant outlet temperature, the theoretical value of engine turbine inlet temperature, the measured value of engine intercooler temperature, and the theoretical value of engine intercooler pressure variation.

[0120] The preset theoretical values ​​of the restriction parameters are respectively set with corresponding theoretical values ​​for warning restriction, interruption restriction, and emergency restriction.

[0121] The limiting specifications for the engine, as determined by a specific embodiment, are shown in Table 6:

[0122] Table 6

[0123]

[0124]

[0125]

[0126] Understandably, the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset limit parameters to obtain the engine degradation test results. If the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter exceed the theoretical values ​​of the warning limit parameters, attention is required. If the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter exceed the theoretical values ​​of the interruption limit parameters, the engine is controlled to run at low idle speed for 30 seconds and then stopped. If the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter exceed the theoretical values ​​of the emergency limit parameters, the engine is controlled to stop to prevent damage to parts.

[0127] To better implement the engine degradation test method in this embodiment of the invention, please refer to the corresponding documentation. Figure 3 , Figure 3 A schematic diagram of an embodiment of the device provided by the present invention includes:

[0128] The first control unit 301 is used to control the engine to run for a first duration at a first speed and a first load, run for a second duration at a low idle speed, and remain stopped for a third duration, and to obtain the measured values ​​corresponding to the first test parameters; the low idle speed is the engine's idle speed when it is not under load.

[0129] The second control unit 302 is used to control the engine to run for a first duration at a second speed and a second load, run for a second duration at a low idle speed, and remain stopped for a third duration after obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, and to obtain the measured value corresponding to the second test parameter.

[0130] The third control unit 303 is used to control the engine to run for a first duration at a third speed and a third load, run for a second duration at low idle speed, and remain stopped for a third duration after obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, and to obtain the measured value corresponding to the third test parameter.

[0131] The matching unit 304 is used to compare the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results.

[0132] Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve.

[0133] The engine degradation testing apparatus provided in the above embodiments can realize the technical solution described in the above embodiment of the engine degradation testing method. The specific implementation principle of each module or unit can be found in the corresponding content in the above embodiment of the engine degradation testing method, which will not be repeated here.

[0134] like Figure 4 As shown, the present invention also provides an electronic device 400. The electronic device 400 includes a processor 401, a memory 402, and a display 403. Figure 4 Only some components of the electronic device 400 are shown, but it should be understood that it is not required to implement all the components shown, and more or fewer components may be implemented instead.

[0135] In some embodiments, memory 402 may be an internal storage unit of electronic device 400, such as a hard disk or memory of electronic device 400. In other embodiments, memory 402 may also be an external storage device of electronic device 400, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on electronic device 400.

[0136] Furthermore, the memory 402 may include both internal storage units of the electronic device 400 and external storage devices. The memory 402 is used to store application software and various types of data installed on the electronic device 400.

[0137] In some embodiments, processor 401 may be a central processing unit (CPU), microprocessor, or other data processing chip, used to run program code stored in memory 402 or process data, such as an engine deterioration test method in this invention.

[0138] In some embodiments, display 403 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 403 is used to display information from electronic device 400 and to display a visual user interface. Components 401-403 of electronic device 400 communicate with each other via a system bus.

[0139] In some embodiments of the present invention, when the processor 401 executes the engine degradation test program in the memory 402, the following steps can be implemented:

[0140] S110. Control the engine to run for a first duration at a first speed and a first load, run for a second duration at a low idle speed, and remain stopped for a third duration, and obtain the measured value corresponding to the first test parameter; the low idle speed is the engine's idle speed when it is not under load;

[0141] S120. After obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, the engine is controlled to run for a first time at the second speed and the second load, run for a second time at low idle speed, and remain stopped for a third time, and the measured value corresponding to the second test parameter is obtained.

[0142] S130. After obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, the engine is controlled to run for a first time at the third speed and the third load, run for a second time at low idle speed and remain stopped for a third time, and the measured value corresponding to the third test parameter is obtained.

[0143] S140. The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results.

[0144] Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the engine's maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical speed at the inflection point of the engine's speed regulation curve.

[0145] It should be understood that when the processor 401 executes the engine degradation test program in the memory 402, in addition to the functions mentioned above, it can also perform other functions, as can be found in the description of the corresponding method embodiments above.

[0146] Furthermore, this embodiment of the invention does not specifically limit the type of electronic device 400 mentioned. Electronic device 400 can be a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, laptop computer, or other portable electronic device. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable electronic device can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the invention, electronic device 400 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0147] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform an engine degradation test method provided by the methods described above, the method comprising:

[0148] S110. Control the engine to run for a first duration at a first speed and a first load, run for a second duration at a low idle speed, and remain stopped for a third duration, and obtain the measured value corresponding to the first test parameter; the low idle speed is the engine's idle speed when it is not under load;

[0149] S120. After obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, the engine is controlled to run for a first time at the second speed and the second load, run for a second time at low idle speed, and remain stopped for a third time, and the measured value corresponding to the second test parameter is obtained.

[0150] S130. After obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, the engine is controlled to run for a first time at the third speed and the third load, run for a second time at low idle speed and remain stopped for a third time, and the measured value corresponding to the third test parameter is obtained.

[0151] S140. The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results.

[0152] Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve.

[0153] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0154] The present invention provides a detailed description of an engine degradation test method, apparatus, electronic device, and storage medium. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for testing engine degradation, characterized in that, include: S110. Control the engine to run for a first duration at a first speed and a first load, run for a second duration at a low idle speed, and remain stopped for a third duration, and obtain the measured value corresponding to the first test parameter; the low idle speed is the engine's idle speed when it is not under load; S120. After obtaining the first measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, the engine is controlled to run for a first duration at the second speed and the second load, run for a second duration at low idle speed, and remain stopped for a third duration, and the measured value corresponding to the second test parameter is obtained. S130. After obtaining the second measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, the engine is controlled to run for a first time at the third speed and the third load, run for a second time at low idle speed and remain stopped for a third time, and the measured value corresponding to the third test parameter is obtained. S140. The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter are compared with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results. Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the engine's speed regulation curve.

2. The engine degradation test method according to claim 1, characterized in that, Before S110, which controls the engine to run for a first duration at a first speed and a first load, to run for a second duration at a low idle speed, and to remain stopped for a third duration, further includes: Control the engine to run without adding fuel until the engine oil pressure reaches a first preset value; After fuel is added to the engine, the engine is controlled to run sequentially at low idle speed for a fourth time, at high idle speed for a fifth time, at low idle speed for a sixth time, at high idle speed for a seventh time, and at rated power for an eighth time; the high idle speed is the highest speed of the engine at maximum throttle and without load; Control the engine to rotate backward until the engine's backward torque reaches a second preset value; The engine is controlled to operate at maximum torque for a ninth duration; The engine is rotated backward until the engine speed reaches a third preset value; After controlling the engine speed to run at the third preset value for ten hours, it runs at low idle speed for eleven hours. Control the engine to stop.

3. The engine degradation test method according to claim 1, characterized in that, Step S110 is executed repeatedly for n1 hours, where the value of n1 is in the range of [482, 500]. Step S120 is executed repeatedly for n2 hours, where the value of n2 is in the range of [482, 500]. Step S130 is executed repeatedly for n3 hours, where the value of n3 is in the range of [482, 500].

4. The engine degradation test method according to claim 1, characterized in that, The first test parameters include: theoretical values ​​of engine fuel consumption rate and theoretical values ​​of engine rated speed; The second test parameters include: the theoretical value of engine fuel consumption rate and the theoretical value of engine maximum torque speed; The third test parameters include: theoretical values ​​of engine fuel consumption rate, theoretical values ​​of engine maximum cylinder pressure, and theoretical values ​​of engine speed.

5. The engine degradation test method according to claim 1, characterized in that, The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter respectively include: measured values ​​of engine intake air temperature, engine intake resistance, engine coolant outlet temperature, engine exhaust pipe pressure, and engine fuel temperature. The preset general test condition parameters include the following theoretical values: engine intake air temperature, which ranges from [22℃ to 28℃]; engine intake resistance, which ranges from [-4.7Kpa to -2.7Kpa]; engine coolant outlet temperature, which ranges from [99℃ to 131℃]; engine exhaust pressure, which ranges from [35.46 mm Hg to 40.54 mm Hg]; and engine fuel temperature, which ranges from [38℃ to 42℃].

6. The engine degradation test method according to claim 1, characterized in that, The measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter respectively include: the measured value of the engine oil pressure at rated speed, the measured value of the engine cylinder coolant pressure at rated speed, the measured value of the engine coolant outlet temperature, the measured value of the engine turbine inlet temperature, the measured value of the engine intercooler temperature, and the measured value of the engine intercooler pressure variation. The preset limiting parameters include: the theoretical value of engine oil pressure at rated speed, the theoretical value of engine cylinder coolant pressure at rated speed, the theoretical value of engine coolant outlet temperature, the theoretical value of engine turbine inlet temperature, the measured value of engine intercooler temperature, and the theoretical value of engine intercooler pressure variation. The preset theoretical values ​​of the restriction parameters are respectively set with corresponding theoretical values ​​for warning restriction, interruption restriction, and emergency restriction.

7. The engine degradation test method according to claim 1, characterized in that, The first rated power of the engine is the engine's indicated rated power, and the value range of the engine's indicated rated power is [350, 400]. The second rated power of the engine is the maximum rated power of the engine, and the maximum rated power of the engine has a value range of [390, 400]. The third rated power of the engine is the rated power of the engine governor at the sudden change point, and the value range of the rated power of the engine governor at the sudden change point is [375, 380].

8. An engine degradation testing apparatus, characterized in that, include: The first control unit is used to control the engine to run for a first duration at a first speed and a first load, run for a second duration at low idle speed, and remain stopped for a third duration, and to obtain the measured values ​​corresponding to the first test parameters; the low idle speed is the engine's idle speed when it is not under load. The second control unit is used to control the engine to run for a first duration at a second speed and a second load, run for a second duration at a low idle speed, and remain stopped for a third duration after obtaining the measured value corresponding to the first test parameter and determining that the first test power of the engine is less than or equal to the preset first rated power threshold of the engine, and to obtain the measured value corresponding to the second test parameter. The third control unit is used to control the engine to run for a first duration at a third speed and a third load, run for a second duration at low idle speed, and remain stopped for a third duration after obtaining the measured value corresponding to the second test parameter and determining that the second test power of the engine is less than or equal to the preset second rated power threshold of the engine, and to obtain the measured value corresponding to the third test parameter. The matching unit is used to compare the measured values ​​corresponding to the first test parameter, the second test parameter, and the third test parameter with the theoretical values ​​of the preset general test condition parameters and the theoretical values ​​of the limiting specification parameters to obtain the engine deterioration test results. Wherein, the first speed is the theoretical value of the engine's indicated speed, the first load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the indicated speed, the second speed is the theoretical value of the engine's maximum torque speed, the second load is the measured value of the maximum cylinder pressure corresponding to the engine operating at the theoretical value of the maximum torque speed, the third speed is the theoretical value of the speed at the inflection point of the engine's speed regulation curve, and the third load is the theoretical value of the maximum cylinder pressure corresponding to the theoretical value of the speed at the inflection point of the speed regulation curve.

9. An electronic device, characterized in that, Including memory and processor, among which, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in an engine deterioration test method as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements an engine degradation test method as described in any one of claims 1 to 7.

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