Method, device, computer device and storage medium for determining reason for engine oil blackening

Abstract

The present application relates to a method, device, computer device, storage medium, and computer program product for determining the cause of engine oil darkening. The method includes: obtaining initial test drive data and an initial engine oil color; adjusting the parameters in the initial test drive data respectively to obtain multiple sets of adjusted test drive data, where the initial test drive data includes at least one of the following parameters: initial opening degree of the exhaust back pressure valve, on / off state of the exhaust gas recirculation system, initial fuel injection advance angle, initial engine speed, initial load, turbocharger state, initial engine oil grade, and initial piston assembly size; conducting a test drive experiment for each set of the multiple sets of adjusted test drive data, and comparing the oil color after the experiment corresponding to each set of the multiple sets of adjusted test drive data with the initial engine oil color respectively to determine the cause of the engine oil darkening. By using this method, the cause leading to the darkening of the diesel engine oil color can be effectively identified.

Description

Technical Field

[0001] This application relates to the technical field of engine oil lubrication, and particularly to a method, device, computer device, storage medium, and computer program product for determining the cause of engine oil darkening. Background Art

[0002] Engine oil is a widely used lubricant in diesel engines. After a period of use, the engine oil often turns black. Since the problem of engine oil darkening in diesel engines will have an uncertain impact on the operation of diesel engines, the treatment method after the problem of engine oil darkening occurs is to immediately replace the new engine oil, which not only causes waste of cost but also has potential quality hazards. To reduce the impact caused by the problem of engine oil darkening in diesel engines, it is very necessary to find out the cause of the problem of engine oil darkening in diesel engines.

[0003] However, at present, there is no conclusion on the cause of engine oil darkening after short-term operation of diesel engines. Summary of the Invention

[0004] Based on this, in view of the problem of engine oil darkening after short-term operation of the above-mentioned diesel engines, it is necessary to provide a method, device, computer device, computer-readable storage medium, and computer program product for determining the cause of engine oil darkening that can determine the cause of engine oil darkening.

[0005] In a first aspect, this application provides a method for determining the cause of engine oil darkening. The method includes:

[0006] Obtain initial test drive data and initial engine oil color. The initial test drive data is the initial electronic control data used during the test drive experiment, and the initial engine oil color is the engine oil color after the test drive experiment based on the initial test drive data;

[0007] Adjust the parameters in the initial test drive data respectively to obtain multiple sets of adjusted test drive data. The initial test drive data includes at least one of the following parameters: initial opening of the exhaust back pressure valve, on / off state of the exhaust gas recirculation system, initial injection advance angle, initial engine speed, initial load, supercharger state, initial engine oil grade, and initial piston assembly size;

[0008] Conduct a test drive experiment for each set of the multiple sets of adjusted test drive data to obtain multiple sets of engine oil colors after the experiment; compare the engine oil colors after the experiment corresponding to each set of the multiple sets of adjusted test drive data with the initial engine oil color respectively to determine the cause of engine oil darkening.

[0009] In one of the embodiments, adjusting the parameters in the initial test drive data respectively to obtain multiple sets of adjusted test drive data includes:

[0010] If the initial test run data includes: the initial opening degree of the exhaust backpressure valve, then adjust the initial opening degree of the exhaust backpressure valve in the initial test run data to the preset opening degree, obtain the adjusted opening degree of the exhaust backpressure valve, the preset opening degree is greater than the initial opening degree of the exhaust backpressure valve, and the adjusted opening degree of the exhaust backpressure valve is one set of test run data among multiple sets of adjusted test run data;

[0011] If the initial test run data includes: the on-off state of the exhaust gas recirculation system, then adjust the on-off state of the exhaust gas recirculation system in the initial test run data to the closed state, obtain the adjusted on-off state of the exhaust gas recirculation system, and the adjusted on-off state of the exhaust gas recirculation system is one set of test run data among multiple sets of adjusted test run data;

[0012] If the initial test run data includes: the initial fuel injection advance angle, then adjust the initial fuel injection advance angle in the initial test run data to the preset fuel injection advance angle, obtain the adjusted fuel injection advance angle, the preset fuel injection advance angle is greater than the initial fuel injection advance angle, and the adjusted fuel injection advance angle is one set of test run data among multiple sets of adjusted test run data;

[0013] If the initial test run data includes: the initial engine speed, then adjust the initial engine speed in the initial test run data to the preset engine speed, obtain the adjusted engine speed, the adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of test run data among multiple sets of adjusted test run data;

[0014] If the initial test run data includes: the initial load, then adjust the initial load in the initial test run data to the first load and the second load respectively, obtain the first adjusted load and the second adjusted load, the first adjusted load is greater than the load, the second adjusted load is greater than the first adjusted load, and the first adjusted load and the second adjusted load are two sets of test run data among multiple sets of adjusted test run data;

[0015] If the initial test run data includes: the supercharger state, then adjust the supercharger state in the initial test run data to natural aspiration, obtain the adjusted supercharger state, and the adjusted supercharger state is one set of test run data among multiple sets of adjusted test run data;

[0016] If the initial test run data includes: the initial engine oil grade, then adjust the initial engine oil grade in the initial test run data to the preset engine oil grade, obtain the adjusted engine oil grade, and the adjusted engine oil grade is one set of test run data among multiple sets of adjusted test run data;

[0017] If the initial test run data includes the initial piston assembly size, then adjust the initial piston assembly size in the initial test run data to the preset piston assembly size to obtain the adjusted piston assembly size. The preset piston assembly size is smaller than the initial piston assembly size, and the adjusted piston assembly size is one set of test run data among multiple sets of adjusted test run data.

[0018] In one of the embodiments, conduct a test run experiment for each set of test run data among multiple sets of adjusted test run data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of test run data among multiple sets of adjusted test run data with the initial oil color respectively to determine that the reasons for the oil turning black include:

[0019] Conduct a test run experiment for the adjusted exhaust backpressure valve opening degree to obtain the oil color after the exhaust backpressure experiment. The oil color after the exhaust backpressure experiment is one set of oil colors among multiple sets of oil colors after the experiment.

[0020] Compare the oil color after the exhaust backpressure experiment with the initial oil color.

[0021] If the oil color after the exhaust backpressure experiment is not blackened compared with the initial oil color, then determine that the reason for the oil color turning black is that the initial opening degree of the exhaust backpressure valve is too small.

[0022] In one of the embodiments, conduct a test run experiment for each set of test run data among multiple sets of adjusted test run data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of test run data among multiple sets of adjusted test run data with the initial oil color respectively to determine that the reasons for the oil turning black also include:

[0023] Conduct a test run experiment for the adjusted exhaust gas recirculation system switch state to obtain the oil color after the experiment of closing the exhaust gas recirculation system. The oil color after the experiment of closing the exhaust gas recirculation system is one set of oil colors among multiple sets of oil colors after the experiment.

[0024] Compare the oil color after the experiment of closing the exhaust gas recirculation system with the initial oil color.

[0025] If the oil color after the experiment of closing the exhaust gas recirculation system is not blackened compared with the initial oil color, then determine that the reason for the oil color turning black is that the switch state of the exhaust gas recirculation system is open.

[0026] In one of the embodiments, conduct a test run experiment for each set of test run data among multiple sets of adjusted test run data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of test run data among multiple sets of adjusted test run data with the initial oil color respectively to determine that the reasons for the oil turning black also include:

[0027] Conduct a test run experiment for the adjusted fuel injection advance angle to obtain the oil color after the fuel injection advance angle experiment. The oil color after the fuel injection advance angle experiment is one of the oil colors after multiple experiments.

[0028] Compare the oil color after the fuel injection advance angle experiment with the initial oil color.

[0029] If the oil color after the fuel injection advance angle experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial fuel injection advance angle is too small.

[0030] In one embodiment, conduct a test run experiment for each set of test run data among multiple sets of adjusted test run data to obtain multiple sets of oil colors after the experiments. Compare the oil color after the experiment corresponding to each set of test run data among multiple sets of adjusted test run data with the initial oil color respectively. The reasons for the blackening of the oil also include:

[0031] Conduct a test run experiment for the adjusted engine speed to obtain the oil color after the engine speed experiment. The oil color after the engine speed experiment is one of the oil colors after multiple experiments.

[0032] Compare the oil color after the engine speed experiment with the initial oil color.

[0033] If the oil color after the engine speed experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial engine speed is too small.

[0034] In one embodiment, conduct a test run experiment for each set of test run data among multiple sets of adjusted test run data to obtain multiple sets of oil colors after the experiments. Compare the oil color after the experiment corresponding to each set of test run data among multiple sets of adjusted test run data with the initial oil color respectively. The reasons for the blackening of the oil also include:

[0035] Conduct a test run experiment for the first adjusted load to obtain the oil color after the first load experiment, and conduct a test run experiment for the second adjusted load to obtain the oil color after the second load experiment. The oil color after the first load experiment and the oil color after the second load experiment are two of the oil colors after multiple experiments respectively.

[0036] Compare the oil color after the first load experiment and the oil color after the second load experiment with the initial oil color respectively.

[0037] If the oil color after the first load experiment is more significantly blackened compared to the initial oil color, and the oil color after the second load experiment is more significantly blackened compared to the oil color after the first load experiment, determine that the reason for the blackening of the oil color is that the load is too large.

[0038] In one embodiment, a commissioning experiment is conducted for each set of adjusted commissioning data among multiple sets of adjusted commissioning data to obtain the oil colors after multiple sets of experiments; the oil colors after the experiments corresponding to each set of adjusted commissioning data among multiple sets of adjusted commissioning data are respectively compared with the initial oil color, and it is determined that the reasons for the oil turning black also include:

[0039] A commissioning experiment is conducted for the adjusted supercharger state to obtain the oil color after the naturally aspirated experiment, and the oil color after the naturally aspirated experiment is one of the oil colors after multiple sets of experiments;

[0040] The oil color after the naturally aspirated experiment is compared with the initial oil color;

[0041] If the oil color after the naturally aspirated experiment is not blackened compared with the initial oil color, it is determined that the reason for the oil turning black is that the supercharger state is supercharged.

[0042] In one embodiment, a commissioning experiment is conducted for each set of adjusted commissioning data among multiple sets of adjusted commissioning data to obtain the oil colors after multiple sets of experiments; the oil colors after the experiments corresponding to each set of adjusted commissioning data among multiple sets of adjusted commissioning data are respectively compared with the initial oil color, and it is determined that the reasons for the oil turning black also include:

[0043] A commissioning experiment is conducted using the oil corresponding to the adjusted oil grade to obtain the oil color after the oil grade experiment, and the oil color after the oil grade experiment is one of the oil colors after multiple sets of experiments;

[0044] The oil color after the oil grade experiment is compared with the initial oil color;

[0045] If the oil color after the oil grade experiment is not blackened compared with the initial oil color, it is determined that the reason for the oil turning black is that the initial oil grade causes the oil to turn black.

[0046] In one embodiment, a commissioning experiment is conducted for each set of adjusted commissioning data among multiple sets of adjusted commissioning data to obtain the oil colors after multiple sets of experiments; the oil colors after the experiments corresponding to each set of adjusted commissioning data among multiple sets of adjusted commissioning data are respectively compared with the initial oil color, and it is determined that the reasons for the oil turning black also include:

[0047] A commissioning experiment is conducted using the piston assembly corresponding to the adjusted piston assembly size to obtain the oil color after the piston assembly experiment, and the oil color after the piston assembly experiment is one of the oil colors after multiple sets of experiments;

[0048] The oil color after the piston assembly experiment is compared with the initial oil color;

[0049] If the color of the engine oil after the piston assembly experiment is not blackened compared to the initial engine oil color, it is determined that the reason for the blackening of the engine oil is that the initial piston assembly size is too large.

[0050] In a second aspect, the present application also provides a device for determining the reason for engine oil blackening. The device includes:

[0051] An initial data acquisition module, configured to acquire initial test drive data and an initial engine oil color. The initial test drive data is the initial electronic control data used during the test drive experiment, and the initial engine oil color is the engine oil color after the test drive experiment based on the initial test drive data;

[0052] A data adjustment module, configured to adjust the parameters in the initial test drive data respectively to obtain multiple sets of adjusted test drive data. The initial test drive data includes at least one of the following parameters: the initial opening degree of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the turbocharger state, the initial engine oil grade, and the initial piston assembly size;

[0053] A test drive experiment module, configured to conduct a test drive experiment for each set of the multiple sets of adjusted test drive data to obtain multiple sets of engine oil colors after the experiment; compare the engine oil colors after the experiment corresponding to each set of the multiple sets of adjusted test drive data with the initial engine oil color respectively to determine the reason for the engine oil blackening.

[0054] In a third aspect, the present application also provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0055] Acquire initial test drive data and an initial engine oil color. The initial test drive data is the initial electronic control data used during the test drive experiment, and the initial engine oil color is the engine oil color after the test drive experiment based on the initial test drive data; adjust the parameters in the initial test drive data respectively to obtain multiple sets of adjusted test drive data. The initial test drive data includes at least one of the following parameters: the initial opening degree of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the turbocharger state, the initial engine oil grade, and the initial piston assembly size; conduct a test drive experiment for each set of the multiple sets of adjusted test drive data to obtain multiple sets of engine oil colors after the experiment; compare the engine oil colors after the experiment corresponding to each set of the multiple sets of adjusted test drive data with the initial engine oil color respectively to determine the reason for the engine oil blackening.

[0056] Fourthly, the present application also provides a computer-readable storage medium. On the computer-readable storage medium, there is a computer program stored, and when the computer program is executed by a processor, the following steps are implemented:

[0057] Obtain initial commissioning data and an initial engine oil color. The initial commissioning data is the initial electronic control data used during the commissioning experiment, and the initial engine oil color is the engine oil color after the commissioning experiment is carried out according to the initial commissioning data; adjust the parameters in the initial commissioning data respectively to obtain multiple sets of adjusted commissioning data. The initial commissioning data includes at least one of the following parameters: initial opening degree of the exhaust backpressure valve, on / off state of the exhaust gas recirculation system, initial injection advance angle, initial engine speed, initial load, turbocharger state, initial engine oil grade, and initial piston assembly size; conduct commissioning experiments for each set of the multiple sets of adjusted commissioning data to obtain multiple sets of engine oil colors after the experiments; compare the engine oil colors after the experiments corresponding to each set of the multiple sets of adjusted commissioning data with the initial engine oil color respectively to determine the reason for the engine oil turning black.

[0058] Fifthly, the present application also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0059] Obtain initial commissioning data and an initial engine oil color. The initial commissioning data is the initial electronic control data used during the commissioning experiment, and the initial engine oil color is the engine oil color after the commissioning experiment is carried out according to the initial commissioning data; adjust the parameters in the initial commissioning data respectively to obtain multiple sets of adjusted commissioning data. The initial commissioning data includes at least one of the following parameters: initial opening degree of the exhaust backpressure valve, on / off state of the exhaust gas recirculation system, initial injection advance angle, initial engine speed, initial load, turbocharger state, initial engine oil grade, and initial piston assembly size; conduct commissioning experiments for each set of the multiple sets of adjusted commissioning data to obtain multiple sets of engine oil colors after the experiments; compare the engine oil colors after the experiments corresponding to each set of the multiple sets of adjusted commissioning data with the initial engine oil color respectively to determine the reason for the engine oil turning black.

[0060] The method, device, computer equipment, storage medium and computer program product for determining the reason of the engine oil turning black obtain initial test run data and the initial engine oil color. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data. That is, the initial test run data and the initial engine oil color are set as the test run experiment control group. The initial test run data includes at least one of the following parameters: the initial opening degree of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size. Since the initial test run data includes various parameters that may affect the engine oil turning black, by adjusting the parameters in the initial test run data respectively and conducting test run experiments after adjusting the various parameters that affect the engine oil turning black, comparing the obtained engine oil colors after multiple groups of experiments with the initial engine oil color of the test run experiment control group, the reason for the engine oil turning black caused by which parameter can be determined. Therefore, according to the above-mentioned multiple groups of test run experiment methods, the reason for the diesel engine oil turning black can be effectively identified. Description of the Drawings

[0061] Figure 1 It is an application environment diagram of the method for determining the reason of the engine oil turning black in an embodiment;

[0062] Figure 2 It is a flowchart of the method for determining the reason of the engine oil turning black in an embodiment;

[0063] Figure 3 It is a flowchart of the method for determining the reason of the engine oil turning black in another embodiment;

[0064] Figure 4 It is a first sub - flowchart of S600 in an embodiment;

[0065] Figure 5 It is a second sub - flowchart of S600 in an embodiment;

[0066] Figure 6 It is a third sub - flowchart of S600 in an embodiment;

[0067] Figure 7 It is a fourth sub - flowchart of S600 in an embodiment;

[0068] Figure 8 It is a fifth sub - flowchart of S600 in an embodiment;

[0069] Figure 9 It is a sixth sub - flowchart of S600 in an embodiment;

[0070] Figure 10Schematic diagram of the seventh sub - process of S600 in an embodiment;

[0071] Figure 11 Schematic diagram of the eighth sub - process of S600 in an embodiment;

[0072] Figure 12 Structural block diagram of a device for determining the cause of engine oil darkening in an embodiment;

[0073] Figure 13 Internal structure diagram of a computer device in an embodiment. Detailed implementation manners

[0074] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0075] The method for determining the cause of engine oil darkening provided by the embodiments of the present application can be applied to an application environment as shown in Figure 1 wherein, the terminal 102 communicates with the diesel engine 104 through the network. The data storage system can store the data that the terminal 102 needs to process. The data storage system can be integrated on the terminal 102, or placed in the cloud or other network servers. The terminal 102 obtains the initial test - run data and the initial engine oil color. The initial test - run data is the initial electronic control data used during the test - run experiment of the diesel engine 104, and the initial engine oil color is the engine oil color after the test - run experiment based on the initial test - run data; the parameters in the initial test - run data are adjusted respectively to obtain multiple groups of adjusted test - run data. The initial test - run data includes at least one of the following parameters: initial opening degree of the exhaust back - pressure valve, switch state of the exhaust gas recirculation system, initial injection advance angle, initial engine speed, initial load, supercharger state, initial engine oil grade, and initial piston assembly size; for each group of the multiple groups of adjusted test - run data, a test - run experiment is carried out on the diesel engine 104 respectively to obtain multiple groups of engine oil colors after the experiments; the engine oil colors after the experiments corresponding to each group of the multiple groups of adjusted test - run data are compared with the initial engine oil color respectively to determine the cause of engine oil darkening. Among them, the terminal 102 can be, but is not limited to, various personal computers, laptop computers, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart in - vehicle devices, etc. The portable wearable devices can be smart watches, smart bracelets, head - mounted devices, etc.

[0076] In one embodiment, as shown in Figure 2 a method for determining the cause of engine oil darkening is provided, and this method is applied to Figure 1Taking the terminal 102 in [as an example], the following steps are included:

[0077] S200, Obtain the initial test run data and the initial engine oil color. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data.

[0078] Among them, the test run experiment is to test the operation of the diesel engine after assembly and before formal use to check whether the performance indicators of the diesel engine meet the standards. The test run experiment includes experimental steps, experimental time, and electronic control data, etc. The experimental steps refer to the experimental process carried out according to certain experimental steps. The experimental time is the time when the test run experiment is carried out. The electronic control data is the data in the electronic control unit. The control of various devices, switches, and various parameters in the diesel engine can be achieved by adjusting the electronic control data. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data. The engine oil color without the test run experiment is light yellow, and the engine oil color after the test run experiment may change. The initial engine oil color is black. In this application, to determine the reason for the blackening of the engine oil, the initial test run data and the initial engine oil color are obtained, and the initial test run data and the initial engine oil color are used as the test run experiment control group.

[0079] S400, Adjust the parameters in the initial test run data respectively to obtain multiple sets of adjusted test run data. The initial test run data includes at least one of the following parameters: the initial opening of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size.

[0080] Among them, the initial commissioning data includes at least one of the following parameters: the initial opening degree of the exhaust backpressure valve, the switch state of the exhaust gas recirculation system, the initial fuel injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size. Among them, the exhaust backpressure is the pressure in the engine exhaust pipe. The size of the exhaust backpressure can be adjusted by adjusting the opening degree of the exhaust backpressure valve. For example, an opening degree of 100% of the exhaust backpressure valve means that the exhaust backpressure valve is fully opened, and an opening degree of 50% of the exhaust backpressure valve means that the exhaust backpressure valve is opened halfway. Preferably, the initial opening degree of the exhaust backpressure valve can be 35%. The exhaust gas recirculation system (EGR) refers to a system that returns a part of the exhaust gas discharged from the engine to the intake pipe and enters the cylinder again together with the fresh air-fuel mixture. By controlling the switch state of the exhaust gas recirculation system, the recirculation ratio and temperature of the exhaust gas can be accurately monitored. Preferably, the switch state of the exhaust gas recirculation system in this application can be the open state. The fuel injection advance angle is the crankshaft angle when the piston is at the top dead center when the fuel injector starts injecting fuel. The size of the fuel injection advance angle has a great influence on the operation of the diesel engine. When the fuel injection advance angle is too large, the pre-combustion period will be longer, causing the engine to work roughly. When the fuel injection advance angle is too small, the combustion process will be delayed too much, the maximum pressure value will decrease, and the engine will emit black smoke. Preferably, the initial fuel injection advance angle in this application can be 15 degrees. The engine speed is the number of revolutions per minute of the engine crankshaft. The level of the engine speed is related to the number of work cycles per unit time. Preferably, the initial engine speed in this application is 700 r / min. The load of a diesel engine refers to the load of the diesel engine, usually referring to the size of the resistance torque of the diesel engine. The load is a proportional parameter reflecting the load capacity of the diesel engine. For example, the load at full load is 100%, and the load at no load is 0%. During the commissioning experiment, the size of the load is mainly controlled by the throttle, that is, the fuel supply. If the throttle is increased, the load, torque, and fuel consumption will all increase. Preferably, the initial load in this application can be 10%. A supercharger is a device that pre-compresses air before it is supplied to the cylinder to increase the air density and the intake air volume. Preferably, the supercharger used in this application is a turbocharger. The turbocharger uses the inertial force of the exhaust gas discharged from the engine to drive the turbine in the turbine chamber. The turbine then drives the coaxial impeller. The impeller compresses the air sent from the air filter pipe and makes it enter the cylinder under pressure. The state of the supercharger can be supercharged or naturally aspirated. Preferably, the supercharger state in this application is supercharged.The oil product number refers to the variety model of the oil. For example, classified by the oil quality grade, it includes: SA, SB, SC, SE, SF, SG, SH, SJ, SL, and SM; classified by the low-temperature viscosity level, it includes 0W, 5W, 10W, 15W, 20W, and 25W; classified by the high-temperature viscosity level, it includes 20, 30, 40, 50, and 60. The larger the data, the higher the viscosity. Preferably, the initial oil product number in this application is SJ 5W30; the piston assembly includes a cylinder block, a piston, and piston rings. The piston assembly dimensions include the cylinder block dimensions, piston dimensions, and piston ring dimensions. Preferably, the initial piston assembly dimensions selected in this application are the piston assembly dimensions of a certain 4-cylinder National VI diesel engine. The above parameters are all parameters that may affect the blackening of the oil color. The initial opening of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial oil product number, and the initial piston assembly dimensions in the initial test run data are adjusted respectively to obtain multiple sets of adjusted test run data. It should be noted that this application does not specifically limit the values of the initial opening of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial oil product number, and the initial piston assembly dimensions.

[0081] S600, conduct a test run experiment for each set of test run data among the multiple sets of adjusted test run data to obtain the oil colors after multiple sets of experiments; compare the oil colors after experiments corresponding to each set of test run data among the multiple sets of adjusted test run data with the initial oil color respectively to determine the reason for the blackening of the oil.

[0082] Among them, the initial test run data and the initial oil color are used as the control group for the test run experiment. Conduct a test run experiment for each set of test run data among the multiple sets of adjusted test run data to form multiple sets of test run experiments. The oil colors after each set of test run experiments are different. Obtain the oil colors after multiple sets of experiments. Compare the oil colors after experiments corresponding to each set of test run data among the multiple sets of adjusted test run data with the initial oil color respectively, that is, compare the oil colors after multiple sets of experiments with the initial oil color of the control group of the test run experiment. According to the difference between the oil color of the experimental group and the oil color of the control group, it can be deduced which corresponding parameter causes the blackening of the oil color, and then the reason for the blackening of the oil can be determined.

[0083] In the method for determining the reason for the blackening of the engine oil described above, by obtaining the initial test run data and the initial engine oil color, the initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data. That is, the initial test run data and the initial engine oil color are set as the test run experiment control group. The initial test run data includes at least one of the following parameters: the initial opening degree of the exhaust back pressure valve, the on / off state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size. Since the initial test run data includes various parameters that may affect the blackening of the engine oil color, by separately adjusting the parameters in the initial test run data and conducting a test run experiment after adjusting the various parameters that affect the blackening of the engine oil color, the engine oil colors after multiple groups of experiments are compared with the initial engine oil color of the test run experiment control group, and thus, the reason for the blackening of the engine oil can be determined as which parameter causes it. Therefore, based on the above multi-group test run experiment method, the reason for the blackening of the diesel engine oil can be effectively identified.

[0084] In one embodiment, as Figure 3 shown, separately adjust the parameters in the initial test run data to obtain multiple groups of adjusted test run data, including:

[0085] S410, if the initial test run data includes: the initial opening degree of the exhaust back pressure valve, then adjust the initial opening degree of the exhaust back pressure valve in the initial test run data to a preset opening degree to obtain the adjusted exhaust back pressure valve opening degree. The preset opening degree is greater than the initial opening degree of the exhaust back pressure valve, and the adjusted exhaust back pressure valve opening degree is one set of test run data among the multiple groups of adjusted test run data;

[0086] S420, if the initial test run data includes: the on / off state of the exhaust gas recirculation system, then adjust the on / off state of the exhaust gas recirculation system in the initial test run data to closed to obtain the adjusted on / off state of the exhaust gas recirculation system. The adjusted on / off state of the exhaust gas recirculation system is one set of test run data among the multiple groups of adjusted test run data;

[0087] S430, if the initial test run data includes: the initial injection advance angle, then adjust the initial injection advance angle in the initial test run data to a preset injection advance angle to obtain the adjusted injection advance angle. The preset injection advance angle is greater than the initial injection advance angle, and the adjusted injection advance angle is one set of test run data among the multiple groups of adjusted test run data;

[0088] S440, if the initial test run data includes: the initial engine speed, then adjust the initial engine speed in the initial test run data to a preset engine speed to obtain the adjusted engine speed. The adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of test run data among the multiple groups of adjusted test run data;

[0089] S450, if the initial commissioning data includes: the initial load, then adjust the initial load in the initial commissioning data to the first load and the second load respectively, to obtain the first adjusted load and the second adjusted load. The first adjusted load is greater than the load, and the second adjusted load is greater than the first adjusted load. The first adjusted load and the second adjusted load are two sets of commissioning data among multiple sets of adjusted commissioning data;

[0090] S460, if the initial commissioning data includes: the supercharger state, then adjust the supercharger state in the initial commissioning data to natural aspiration to obtain the adjusted supercharger state. The adjusted supercharger state is one set of commissioning data among multiple sets of adjusted commissioning data;

[0091] S470, if the initial commissioning data includes: the initial oil grade, then adjust the initial oil grade in the initial commissioning data to the preset oil grade to obtain the adjusted oil grade. The adjusted oil grade is one set of commissioning data among multiple sets of adjusted commissioning data;

[0092] S480, if the initial commissioning data includes: the initial piston assembly size, then adjust the initial piston assembly size in the initial commissioning data to the preset piston assembly size to obtain the adjusted piston assembly size. The preset piston assembly size is smaller than the initial piston assembly size. The adjusted piston assembly size is one set of commissioning data among multiple sets of adjusted commissioning data.

[0093] In this embodiment, if the initial commissioning data includes the initial opening degree of the exhaust backpressure valve, then adjust the initial opening degree of the exhaust backpressure valve in the initial commissioning data to a preset opening degree to obtain the adjusted opening degree of the exhaust backpressure valve. The preset opening degree is greater than the initial opening degree of the exhaust backpressure valve. For example, if the initial opening degree of the exhaust backpressure valve is 35% and the preset opening degree is 100%, then the adjusted opening degree of the exhaust backpressure valve is 100%. As the opening degree of the exhaust backpressure valve increases, the pressure in the exhaust pipe decreases, enabling the exhaust gas in the exhaust pipe to be discharged as quickly and thoroughly as possible. If the initial commissioning data includes the on-off state of the exhaust gas recirculation system, then adjust the on-off state of the exhaust gas recirculation system in the initial commissioning data to the closed state to obtain the adjusted on-off state of the exhaust gas recirculation system. For example, if the on-off state of the exhaust gas recirculation system in the initial commissioning data is the open state, then the adjusted on-off state of the exhaust gas recirculation system is the closed state. At this time, the operation of the exhaust gas recirculation system will be completely shut down, and the soot will not participate in the combustion in the combustion chamber. If the initial commissioning data includes the initial fuel injection advance angle, then adjust the initial fuel injection advance angle in the initial commissioning data to a preset fuel injection advance angle to obtain the adjusted fuel injection advance angle. The preset fuel injection advance angle is greater than the initial fuel injection advance angle. For example, if the initial fuel injection advance angle is 15 degrees and the preset fuel injection advance angle is 25 degrees, then the adjusted fuel injection advance angle is 25 degrees. As the fuel injection advance angle increases, more fuel is injected into the combustion chamber, and the mixing time of fuel and air becomes longer. If the initial commissioning data includes the initial engine speed, then adjust the initial engine speed in the initial commissioning data to a preset engine speed to obtain the adjusted engine speed. For example, if the initial engine speed is 700 r / min and the preset engine speed is 1500 r / min, then the adjusted engine speed is 1500 r / min. The rail pressure corresponding to an engine speed of 700 r / min is 1200 bar, and the rail pressure corresponding to an engine speed of 1500 r / min is 1700 bar. As the engine speed increases, the rail pressure increases. If the initial commissioning data includes the initial load, then adjust the initial load in the initial commissioning data to a first load and a second load respectively to obtain the first adjusted load and the second adjusted load. The first adjusted load is greater than the initial load, and the second adjusted load is greater than the first adjusted load. For example, if the initial load is 10%, the first load is 30%, and the second load is 50%, then the first adjusted load is 30% and the second adjusted load is 50%. As the load increases, the soot increases rapidly, and problems such as deteriorated combustion and incomplete combustion of the air-fuel mixture occur, and the soot in the exhaust increases sharply. At this time, the fuel consumption rate also increases rapidly. If the initial commissioning data includes the supercharger state, then adjust the supercharger state in the initial commissioning data to natural aspiration to obtain the adjusted supercharger state. For example, if the supercharger state in the initial commissioning data is supercharged, the adjusted supercharger state is natural aspiration. Since the rotating bearing of the supercharger is the position with the highest oil temperature, the high temperature of the rotating bearing of the supercharger may cause the coking of the engine oil.If the initial test run data includes: the initial engine oil grade, then adjust the initial engine oil grade in the initial test run data to the preset engine oil grade to obtain the adjusted engine oil grade. For example, if the initial engine oil grade is SJ 5W30 and the preset engine oil grade is SL 5W30, then the adjusted engine oil grade is SL 5W30; if the initial test run data includes: the initial piston assembly size, then adjust the initial piston assembly size in the initial test run data to the preset piston assembly size to obtain the adjusted piston assembly size. The preset piston assembly size is smaller than the initial piston assembly size. For example, if the initial piston assembly size is the piston assembly size of a certain 4-cylinder National VI diesel engine and the preset piston assembly size is the piston assembly size of a certain 4-cylinder National V diesel engine, then the adjusted piston assembly size is the piston assembly size of a certain 4-cylinder National V diesel engine, and the adjusted piston assembly size becomes smaller. The adjusted exhaust backpressure valve opening degree, the adjusted exhaust gas recirculation system switch state, the adjusted fuel injection advance angle, the adjusted engine speed, the first adjusted load, the second adjusted load, the adjusted turbocharger state, the adjusted engine oil grade, and the adjusted piston assembly size are each a set of test run data in multiple sets of adjusted test run data.;

[0094] For the solution of the above embodiment, by adjusting the parameters in the initial test run data respectively, and combining the working principle of the diesel engine, the design principle of the EGR system, and the engine oil lubrication principle of the diesel engine, it can be inferred that the parameters in the above initial test run data all have a certain influence on the blackening of the engine oil color. The multiple sets of adjusted test run data obtained can provide a data basis for the test run experiment, which is beneficial to determining the cause of the blackening of the engine oil color.

[0095] In one embodiment, as Figure 4 shown, conduct a test run experiment for each set of test run data in multiple sets of adjusted test run data to obtain the engine oil colors after multiple experiments; compare the engine oil colors after the experiments corresponding to each set of test run data in multiple sets of adjusted test run data with the initial engine oil color respectively to determine that the reasons for the blackening of the engine oil include:

[0096] S612, conduct a test run experiment for the adjusted exhaust backpressure valve opening degree to obtain the engine oil color after the exhaust backpressure experiment. The engine oil color after the exhaust backpressure experiment is one of the engine oil colors after multiple experiments;

[0097] S614, compare the engine oil color after the exhaust backpressure experiment with the initial engine oil color;

[0098] S616, if the engine oil color after the exhaust backpressure experiment is not blackened compared with the initial engine oil color, then determine that the reason for the blackening of the engine oil color is that the initial opening degree of the exhaust backpressure valve is too small.

[0099] In this embodiment, a set of commissioning tests is carried out with the adjusted opening degree of the exhaust backpressure valve, and the oil color after the exhaust backpressure test is obtained. The oil color after the exhaust backpressure test is one of the oil colors after multiple tests. The oil color after the exhaust backpressure test is compared with the initial oil color. Since the adjusted opening degree of the exhaust backpressure valve is larger than the initial opening degree of the exhaust backpressure valve, if the oil color after the exhaust backpressure test is not blackened or has a lower degree of blackening compared with the initial oil color, it indicates that the larger the opening degree of the exhaust backpressure valve, the lower the degree of blackening of the oil color. It is determined that the reason for the blackening of the oil color is that the initial opening degree of the exhaust backpressure valve is too small.

[0100] For the solution of the above embodiment, a commissioning test is carried out with the adjusted opening degree of the exhaust backpressure valve. If the oil color obtained after the test is not blackened compared with the initial oil color, it indicates that as the opening degree of the exhaust backpressure valve increases, the degree of blackening of the oil color decreases. It is determined that the reason for the blackening of the oil color is that the initial opening degree of the exhaust backpressure valve is too small. According to the working principle of the diesel engine, it is desirable that the pressure in the exhaust pipe is as small as possible in the ideal state, so that the exhaust gas can be discharged as quickly and thoroughly as possible. Increasing the opening degree of the exhaust backpressure valve can reduce the pressure in the exhaust pipe. After the exhaust gas is discharged completely, the oil color is no longer blackened. Therefore, the result of the commissioning test is the same as the result inferred from the working principle of the diesel engine, which proves that the test method is effective. Using the method of adjusting the opening degree of the exhaust backpressure valve to carry out the commissioning test can determine the reason for the blackening of the oil.

[0101] In one embodiment, as Figure 5 shown, commissioning tests are carried out for each set of commissioning data after adjustment, and the oil colors after multiple tests are obtained; the oil colors after the tests corresponding to each set of commissioning data after multiple adjustments are respectively compared with the initial oil color, and the reasons for the blackening of the oil also include:

[0102] S622, Carry out a commissioning test for the adjusted exhaust gas recirculation system switch state, and obtain the oil color after the exhaust gas recirculation system is closed. The oil color after the exhaust gas recirculation system is closed is one of the oil colors after multiple tests;

[0103] S624, Compare the oil color after the exhaust gas recirculation system is closed with the initial oil color;

[0104] S626, If the oil color after the exhaust gas recirculation system is closed is not blackened compared with the initial oil color, it is determined that the reason for the blackening of the oil color is that the switch state of the exhaust gas recirculation system is open.

[0105] In this embodiment, a group of commissioning tests are carried out with the adjusted exhaust gas recirculation system switch state, that is, after the exhaust gas recirculation system is adjusted from the open state to the closed state, a group of commissioning tests are carried out to obtain the oil color after the experiment of closing the exhaust gas recirculation system. The oil color after the experiment of closing the exhaust gas recirculation system is one of the oil colors after multiple groups of experiments. The oil color after the experiment of closing the exhaust gas recirculation system is compared with the initial oil color. Since the adjusted exhaust gas recirculation system switch state is the closed state, if the oil color after the experiment of closing the exhaust gas recirculation system is not blackened or has a lower degree of blackening compared with the initial oil color, it indicates that after the exhaust gas recirculation system is closed, the degree of blackening of the oil color is reduced, and it is determined that the reason for the blackening of the oil color is that the switch state of the exhaust gas recirculation system is open.

[0106] For the solution of the above embodiment, by closing the exhaust gas recirculation system for commissioning tests, if the oil color obtained after the experiment is not blackened compared with the initial oil color, it indicates that after the exhaust gas recirculation system is closed, the degree of blackening of the oil color is reduced, and it is determined that the reason for the blackening of the oil color is that the switch state of the exhaust gas recirculation system is open. According to the design principle of the exhaust gas recirculation system, part of the exhaust gas discharged from the engine is sent back to the intake pipe through the exhaust gas recirculation system and enters the cylinder again together with the fresh air-fuel mixture. After the exhaust gas recirculation system is closed, the soot does not participate in the combustion in the combustion chamber, and the oil color is no longer blackened. Therefore, the result of the commissioning test is the same as the result inferred from the design principle of the exhaust gas recirculation system, which proves that the experimental method is effective. Using the method of closing the exhaust gas recirculation system for commissioning tests can determine the reason for the blackening of the oil.

[0107] In one embodiment, as Figure 6 shown, commissioning tests are carried out for each set of commissioning data after adjustment among multiple sets of commissioning data after adjustment to obtain the oil colors after multiple groups of experiments; the oil colors after the experiments corresponding to each set of commissioning data among multiple sets of commissioning data after adjustment are respectively compared with the initial oil color, and it is determined that the reasons for the blackening of the oil also include:

[0108] S632, Carry out a commissioning test for the adjusted fuel injection advance angle to obtain the oil color after the fuel injection advance angle experiment. The oil color after the fuel injection advance angle experiment is one of the oil colors after multiple groups of experiments;

[0109] S634, Compare the oil color after the fuel injection advance angle experiment with the initial oil color;

[0110] S636, If the oil color after the fuel injection advance angle experiment is not blackened compared with the initial oil color, it is determined that the reason for the blackening of the oil color is that the initial fuel injection advance angle is too small.

[0111] In this embodiment, a set of test runs is carried out with the adjusted fuel injection advance angle to obtain the oil color after the fuel injection advance angle test. The oil color after the fuel injection advance angle test is one of the oil colors after multiple tests. The oil color after the fuel injection advance angle test is compared with the initial oil color. Since the adjusted fuel injection advance angle is larger than the initial fuel injection advance angle, if the oil color after the fuel injection advance angle test is not blackened or has a lower degree of blackening compared to the initial oil color, it indicates that the larger the fuel injection advance angle, the lower the degree of oil color blackening. It is determined that the reason for the oil color blackening is that the initial fuel injection advance angle is too small.

[0112] For the solution of the above embodiment, a test run is carried out with the adjusted fuel injection advance angle. If the oil color obtained after the test is not blackened compared to the initial oil color, it indicates that as the fuel injection advance angle increases, the degree of oil color blackening decreases. It is determined that the reason for the oil color blackening is that the initial fuel injection advance angle is too small. According to the working principle of the diesel engine, when the fuel injection advance angle increases, more fuel is injected into the combustion chamber, the fuel-air mixing time becomes longer, the fuel burns fully, and the oil color no longer turns black. Therefore, the result of the test run is the same as the result inferred from the working principle of the diesel engine, proving that this test method is effective. Using the method of adjusting the fuel injection advance angle for the test run can determine the reason for the oil blackening.

[0113] In one embodiment, as Figure 7 shown, a test run is carried out for each set of test run data among multiple sets of adjusted test run data to obtain multiple sets of oil colors after the test; the oil color after the test corresponding to each set of test run data among multiple sets of adjusted test run data is respectively compared with the initial oil color. The reasons for the oil blackening also include:

[0114] S642, a test run is carried out for the adjusted engine speed to obtain the oil color after the engine speed test. The oil color after the engine speed test is one of the oil colors after multiple tests;

[0115] S644, compare the oil color after the engine speed test with the initial oil color;

[0116] S646, if the oil color after the engine speed test is not blackened compared to the initial oil color, it is determined that the reason for the oil color blackening is that the initial engine speed is too small.

[0117] In this embodiment, a set of test runs is carried out using the adjusted engine speed, and the oil color after the engine speed test is obtained. The oil color after the engine speed test is one of the oil colors after multiple tests. The oil color after the engine speed test is compared with the initial oil color. Since the adjusted engine speed is greater than the initial engine speed, if the oil color after the engine speed test is not blackened or has a lower degree of blackening compared to the initial oil color, it indicates that the greater the engine speed, the lower the degree of blackening of the oil color. It is determined that the reason for the blackening of the oil color is that the initial engine speed is too small.

[0118] For the solution of the above embodiment, by carrying out a test run using the adjusted engine speed, if the oil color obtained after the test is not blackened compared to the initial oil color, it indicates that as the engine speed increases, the degree of blackening of the oil color decreases. It is determined that the reason for the blackening of the oil color is that the initial engine speed is too small. According to the working principle of the diesel engine, as the engine speed increases, the corresponding rail pressure increases. A higher rail pressure can improve the fuel injection pressure, enabling the fuel to obtain good combustion characteristics and the oil color no longer turns black. Therefore, the result of the test run is the same as the result inferred from the working principle of the diesel engine, proving that this test method is effective. Using the method of adjusting the engine speed to carry out the test run can determine the reason for the blackening of the oil.

[0119] In one embodiment, as Figure 8 shown, a test run is carried out for each set of test run data after adjustment among multiple sets of test run data after adjustment, and multiple sets of oil colors after the test are obtained; the oil color after the test corresponding to each set of test run data among multiple sets of test run data after adjustment is respectively compared with the initial oil color, and the reasons for the blackening of the oil are also included:

[0120] S652, a test run is carried out for the first adjusted load, and the oil color after the first load test is obtained. A test run is carried out for the second adjusted load, and the oil color after the second load test is obtained. The oil color after the first load test and the oil color after the second load test are respectively two of the oil colors after multiple tests;

[0121] S654, the oil color after the first load test and the oil color after the second load test are respectively compared with the initial oil color;

[0122] S656, if the oil color after the first load test is more significantly blackened compared to the initial oil color, and the oil color after the second load test is more significantly blackened compared to the oil color after the first load test, then it is determined that the reason for the blackening of the oil color is that the load is too large.

[0123] In this embodiment, a commissioning test is carried out with a first adjusted load, and a commissioning test is carried out with a second adjusted load to obtain the oil colors after two sets of load tests. The oil colors after the first load test and the oil colors after the second load test are two sets of oil colors among the oil colors after multiple tests. The oil colors after the two sets of load tests are respectively compared with the initial oil color. Since the first adjusted load is larger than the initial load and the second adjusted load is larger than the first adjusted load, if the degree of blackening of the oil colors after the two sets of load tests gradually deepens compared with the initial oil color, it indicates that the larger the load, the higher the degree of blackening of the oil color, and it is determined that the reason for the blackening of the oil color is excessive load.

[0124] For the solution of the above embodiment, by carrying out a commissioning test with two sets of adjusted loads, if the degree of blackening of the oil colors obtained after the two sets of load tests gradually deepens compared with the initial oil color, it indicates that as the load increases, the degree of blackening of the oil color increases, and it is determined that the reason for the blackening of the oil color is excessive load. According to the working principle of the diesel engine, at high loads, soot rapidly increases, problems such as deteriorated combustion and incomplete combustion of the air-fuel mixture occur, and the soot in the exhaust pipe rapidly increases, and the degree of blackening of the oil color deepens. Therefore, the result of the commissioning test is the same as the result inferred from the working principle of the diesel engine, proving that this test method is effective, and using the method of adjusting the load to carry out the commissioning test can determine the reason for the blackening of the oil.

[0125] In one embodiment, as Figure 9 shown, a commissioning test is carried out for each set of commissioning data after multiple adjustments to obtain the oil colors after multiple tests; the oil colors after the tests corresponding to each set of commissioning data among the multiple sets of commissioning data after adjustment are respectively compared with the initial oil color, and the reasons for the blackening of the oil also include:

[0126] S662, carry out a commissioning test for the adjusted supercharger state to obtain the oil color after the natural aspiration test. The oil color after the natural aspiration test is one set of oil colors among the oil colors after multiple tests;

[0127] S664, compare the oil color after the natural aspiration test with the initial oil color;

[0128] S666, if the oil color after the natural aspiration test is not blackened compared with the initial oil color, it is determined that the reason for the blackening of the oil color is that the supercharger state is supercharged.

[0129] In this embodiment, a set of commissioning tests is carried out with the adjusted supercharger state, and the oil color after the naturally aspirated test is obtained. The oil color after the naturally aspirated test is one of the oil colors after multiple tests. The oil color after the naturally aspirated test is compared with the initial oil color. Since the pressure in the cylinder decreases after the supercharger state is adjusted to natural aspiration compared with the supercharged state, if the oil color after the naturally aspirated test does not turn black or has a lower degree of blackening compared with the initial oil color, it indicates that the supercharger state is natural aspiration and the degree of blackening of the oil color decreases. It is determined that the reason for the blackening of the oil color is that the supercharger state is supercharged.

[0130] For the solution of the above embodiment, a commissioning test is carried out with the adjusted supercharger state being natural aspiration. If the oil color obtained after the naturally aspirated test does not turn black compared with the initial oil color, it indicates that as the supercharger state changes to natural aspiration, the degree of blackening of the oil color decreases. It is determined that the reason for the blackening of the oil color is that the supercharger state is supercharged. According to the working principle of the diesel engine, the supercharger is installed on the exhaust side of the engine, so the working temperature of the supercharger is very high, and the rotational speed of the rotor of the supercharger is very high during operation, reaching more than a hundred thousand revolutions per minute. Such a high rotational speed and temperature make the working conditions of the supercharger bearings very harsh, and oil is required for lubrication and cooling. During the operation process, the oil pipeline enters the bearing and then flows into the oil pan. The rotating bearing of the supercharger is the position where the oil temperature is the highest. The high temperature of the rotating bearing of the supercharger can cause the coking of the oil, and the oil color turns black. Therefore, the result of the commissioning test is the same as the result inferred from the working principle of the diesel engine, proving that this test method is effective. Using the method of adjusting the supercharger state to natural aspiration for the commissioning test can determine the reason for the blackening of the oil.

[0131] In one embodiment, as Figure 10 shown, commissioning tests are carried out for each set of commissioning data after adjustment among multiple sets of commissioning data after adjustment, and the oil colors after multiple tests are obtained; the oil colors after the tests corresponding to each set of commissioning data among multiple sets of commissioning data after adjustment are respectively compared with the initial oil color, and it is determined that the reasons for the blackening of the oil also include:

[0132] S672, Carry out a commissioning test with the oil corresponding to the adjusted oil grade, and obtain the oil color after the oil grade test. The oil color after the oil grade test is one of the oil colors after multiple tests;

[0133] S674, Compare the oil color after the oil grade test with the initial oil color;

[0134] S676, If the oil color after the oil grade test does not turn black compared with the initial oil color, it is determined that the reason for the blackening of the oil color is that the initial oil grade causes the oil color to turn black.

[0135] In this embodiment, a group of test runs is carried out using the engine oil corresponding to the adjusted engine oil grade, and the engine oil color after the engine oil grade test is obtained. The engine oil color after the engine oil grade test is one of the engine oil colors after multiple tests. The engine oil color after the engine oil grade test is compared with the initial engine oil color. Since the engine oil corresponding to the adjusted engine oil grade has a higher quality grade than the engine oil corresponding to the initial engine oil grade, if the engine oil color after the engine oil grade test is not blackened or has a lower degree of blackening compared to the initial engine oil color, it indicates that the higher the quality grade of the engine oil grade, the lower the degree of blackening of the engine oil color. It is determined that the reason for the blackening of the engine oil color is that the initial engine oil grade causes the engine oil color to blacken.

[0136] For the solution of the above embodiment, a test run is carried out using the engine oil corresponding to the adjusted engine oil grade. If the engine oil color obtained after the test is not blackened compared to the initial engine oil color, it indicates that as the quality grade of the engine oil grade increases, the degree of blackening of the engine oil color decreases. It is determined that the reason for the blackening of the engine oil color is that the initial engine oil grade causes the engine oil color to blacken. According to the engine oil lubrication principle of the diesel engine, the higher the quality grade of the engine oil grade, the better the combustion state, and the weaker the degree of blackening of the engine oil color. Therefore, the result of the test run is the same as the result inferred from the engine oil lubrication principle of the diesel engine, proving that this test method is effective. Using the method of using the engine oil corresponding to the adjusted engine oil grade for the test run can determine the reason for the blackening of the engine oil.

[0137] In one embodiment, as Figure 11 shown, a test run is carried out for each set of test run data among multiple sets of adjusted test run data to obtain the engine oil colors after multiple tests; the engine oil colors after the tests corresponding to each set of test run data among multiple sets of adjusted test run data are respectively compared with the initial engine oil color, and it is determined that the reasons for the blackening of the engine oil also include:

[0138] S682, a test run is carried out using the piston assembly corresponding to the adjusted piston assembly size to obtain the engine oil color after the piston assembly test. The engine oil color after the piston assembly test is one of the engine oil colors after multiple tests;

[0139] S684, compare the engine oil color after the piston assembly test with the initial engine oil color;

[0140] S686, if the engine oil color after the piston assembly test is not blackened compared to the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the initial piston assembly size is too large.

[0141] In this embodiment, a set of commissioning tests is carried out using the piston assembly corresponding to the adjusted piston assembly size, and the oil color after the piston assembly test is obtained. The oil color after the piston assembly test is one of the oil colors after multiple tests. The oil color after the piston assembly test is compared with the initial oil color. Since the adjusted piston assembly size is smaller than the initial piston assembly size, if the oil color after the piston assembly test is not blackened or has a lower degree of blackening compared to the initial oil color, it indicates that the smaller the piston assembly size, the lower the degree of oil color blackening, and it is determined that the reason for the oil color blackening is that the initial piston assembly size is too large.

[0142] For the solution of the above embodiment, by carrying out a commissioning test using the piston assembly corresponding to the adjusted piston assembly size, if the oil color obtained after the test is not blackened compared to the initial oil color, it indicates that as the piston assembly size decreases, the degree of oil color blackening decreases, and it is determined that the reason for the oil color blackening is that the initial piston assembly size is too large. According to the working principle of the diesel engine, it is known that the piston assembly may scrape off the cylinder wall material during the piston movement, causing the oil color to turn black. When the piston assembly is relatively small, it will not scrape against the cylinder wall and will not cause the oil color to turn black. Therefore, the result of the commissioning test is the same as the result inferred from the working principle of the diesel engine, proving that this test method is effective. Using the method of using the piston assembly corresponding to the adjusted piston assembly size for the commissioning test can determine the reason for the oil blackening.

[0143] In one embodiment, the method for determining the reason for the oil blackening further includes:

[0144] The initial commissioning data also includes a rail pressure too low fault code; if the initial commissioning data also includes a rail pressure too low fault code, then the rail pressure too low fault code is eliminated to obtain the initial commissioning data after the fault code is eliminated. The initial commissioning data after the fault code is eliminated is one of the multiple sets of adjusted commissioning data; a commissioning test is carried out on the initial commissioning data after the fault code is eliminated to obtain the oil color after the fault code elimination test. The oil color after the fault code elimination test is one of the oil colors after multiple tests; the oil color after the fault code elimination test is compared with the initial oil color; if the oil color after the fault code elimination test is not blackened compared to the initial oil color, it is determined that the reason for the oil color blackening is that the rail pressure too low fault causes the oil color to blacken.

[0145] In this embodiment, the initial test run data further includes a low rail pressure fault code; if the initial test run data further includes a low rail pressure fault code, the machine shall be immediately stopped after the low rail pressure fault code appears, so as to eliminate the low rail pressure fault code and obtain the initial test run data after the fault code is eliminated. The initial test run data after the fault code is eliminated is one set of test run data among multiple sets of adjusted test run data. Use the initial test run data after the fault code is eliminated to conduct a set of test run experiments to obtain the engine oil color after the fault code elimination experiment. The engine oil color after the fault code elimination experiment is one set of engine oil colors among multiple sets of engine oil colors after experiments. Compare the engine oil color after the fault code elimination experiment with the initial engine oil color. Since the rail pressure after the fault code is eliminated is higher than the rail pressure when the low rail pressure fault code just appears at startup, if the engine oil color after the fault code elimination experiment is not blackened or has a lower degree of blackening compared to the initial engine oil color, it indicates that low rail pressure will cause the engine oil color to turn black. It is determined that the reason for the blackening of the engine oil color is that the low rail pressure fault causes the engine oil color to turn black.

[0146] For the solution of the above embodiment, by using the initial test run data after the fault code is eliminated to conduct a test run experiment, if the engine oil color obtained after the fault code elimination experiment is not blackened compared to the initial engine oil color, it indicates that after the low rail pressure fault code is eliminated, the rail pressure increases and the degree of blackening of the engine oil color decreases. It is determined that the reason for the blackening of the engine oil color is that the low rail pressure fault causes the engine oil color to turn black. According to the working principle of the diesel engine, in the initial stage of operation after the diesel engine starts, especially in the low-speed stage, there are a large number of gases in the high-pressure pipeline. These gases are difficult to exhaust completely in a short time after compression, which affects the establishment of the rail pressure, that is, the situation of low rail pressure occurs. Low rail pressure will lead to poor early fuel injection effect and incomplete combustion of the diesel engine. The electronic control unit will report faults of low rail pressure and excessive deviation, which is the most real reaction to the fuel system. Low rail pressure will deteriorate the generation amount of soot after combustion, cause the cylinder exhaust gas to enter the crankcase, and have an adverse impact on the blackening of the engine oil color. Therefore, the result of the test run experiment is the same as the result inferred from the working principle of the diesel engine, which proves that this test method is effective. Using the method of eliminating the fault code to conduct a test run experiment can determine the reason for the blackening of the engine oil.

[0147] To illustrate in detail the method for determining the cause of engine oil blackening and its effect in this solution, the following is described with a most detailed embodiment. The diesel engine used in the initial test run experiment is a certain 4-cylinder National VI diesel engine:

[0148] Obtain the initial test run data, and conduct an initial test run experiment according to the normal test run specifications based on the initial test run data. The test run experiment time is 10 minutes. After the test run experiment is completed, extract 1L of engine oil from the oil pan, observe the initial engine oil color, and the obtained initial engine oil color is black. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment is conducted according to the initial test run data. The initial opening of the exhaust back pressure valve in the initial test run data is 35%, the switch state of the exhaust gas recirculation system is in the open state, the initial fuel injection advance angle is the fuel injection advance angle of a certain four-cylinder National VI diesel engine, the initial engine speed is 700 r / min, the initial load is 10%, the supercharger state is in the supercharged state, the initial engine oil grade is SJ 5W30, and the initial piston assembly size is the piston assembly size assembled on a certain four-cylinder National VI diesel engine. The entire program control of the test run experiment includes 9 steps, and Table 1 shows the steps of the test run experiment:

[0149] Table 1 Steps of the test run experiment

[0150] Type Type number Running time / min Rotational speed / r / min Load / % Running-in 1 M1 2 700 10 Running-in 2 M2 1 1000 10 Running-in 3 M3 1 2500 10 Running-in 4 M4 1 1500 10 Running-in 5 M5 1 2500 10 Inspection 1 T1 1 2500 10 Inspection 2 T2 1 1500 10 Inspection 3 T3 1 1000 10 Inspection 4 T4 1 700 10

[0151] Adjust the parameters in the initial test run data respectively, and conduct a test run experiment for each set of the adjusted test run data to obtain the engine oil colors after multiple experiments. The specific test run experiments include the following groups:

[0152] Experiment 1: After adjusting the initial opening of the exhaust back pressure valve in the initial test run data to 100%, conduct a test run experiment to obtain the engine oil color after the exhaust back pressure experiment;

[0153] Experiment 2: After adjusting the switch state of the exhaust gas recirculation system in the initial test run data to closed, conduct a test run experiment to obtain the engine oil color after the experiment of closing the exhaust gas recirculation system;

[0154] Experiment 3: After adjusting the initial fuel injection advance angle in the initial test run data to the fuel injection advance angle of a certain four-cylinder National V diesel engine, conduct a test run experiment to obtain the engine oil color after the fuel injection advance angle experiment;

[0155] Experiment 4: After adjusting the initial engine speed in the initial test run data to 1500 r / min, conduct a test run experiment to obtain the engine oil color after the engine speed experiment;

[0156] Experiment 5: Conduct a test run by adjusting the operating time of M1 to 5 minutes to obtain the first engine oil color; conduct a test run by adjusting the operating time of M1 to 5 minutes, the load of M2 to 30%, and the operating time of M2 to 5 minutes to obtain the second engine oil color; conduct a test run by adjusting the operating time of M1 to 5 minutes, the load of M2 to 50%, and the operating time of M2 to 4 minutes to obtain the third engine oil color; conduct a test run by adjusting the engine speed to 2500 r / min, the load to 0, and the operating time to 5 minutes to obtain the fourth engine oil color; adjust the diesel engine type to a certain 4-cylinder National VI diesel engine and conduct a test run according to the normal test run specifications to obtain the fifth engine oil color; after adjusting the diesel engine type to a certain 4-cylinder National VI diesel engine and conducting a test run according to the normal test run specifications, adjust the speeds of M1-M5 and T1-T4 to 2500 r / min, the load to 100%, and the operating time to 10 minutes to obtain the sixth engine oil color;

[0157] Conduct test runs after separately adjusting the initial load in the initial test run data to 30% and 50% respectively to obtain the engine oil color after the first load test and the engine oil color after the second load test;

[0158] Experiment 6: Conduct a test run after adjusting the supercharger state in the initial test run data to natural aspiration to obtain the seventh engine oil color; after adjusting the supercharger state in the initial test run data to natural aspiration and reducing the rated power of the diesel engine to 61 kw, adjusting the speed to 2500 r / min, and then separately adjusting the operating time to 5 minutes, 10 minutes, 15 minutes, and 20 minutes to conduct test runs to obtain the eighth, ninth, tenth, and eleventh engine oil colors respectively;

[0159] Experiment 7: Conduct a test run after adjusting the initial engine oil grade in the initial test run data to SL 5W30 to obtain the engine oil color after the engine oil grade test;

[0160] Experiment 8: Conduct a test run after adjusting the initial piston assembly size in the initial test run data to the piston assembly size of a certain 4-cylinder National V diesel engine to obtain the engine oil color after the piston assembly test;

[0161] Experiment 9: After the diesel engine starts, stop immediately when two fault codes of too low rail pressure appear. The two fault codes of too low rail pressure include: Fault Code 1, that is, the actual rail pressure is severely too low, and Fault Code 2, that is, the actual rail pressure is lower than the set value and the deviation is too large. After stopping to eliminate the two fault codes of too low rail pressure, conduct a test run to obtain the engine oil color after the fault code elimination test;

[0162] Experiment 10: The engine oil before the commissioning test and the engine oil after multiple groups of tests were separately sent out for off-site component testing to obtain the content of soot components in multiple groups of engine oil.

[0163] For each group of engine oil after the adjusted commissioning data among multiple groups of commissioning data, compare the color of the engine oil after the test with the color of the initial engine oil to determine the reason for the engine oil turning black. The results of the commissioning test include the following groups:

[0164] Result of Experiment 1: The color of the engine oil after the exhaust backpressure test is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the initial opening degree of the exhaust backpressure valve is too small;

[0165] Result of Experiment 2: The color of the engine oil after the experiment of closing the exhaust gas recirculation system is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the switch state of the exhaust gas recirculation system is open;

[0166] Result of Experiment 3: The color of the engine oil after the injection advance angle experiment is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the initial injection advance angle is too small;

[0167] Result of Experiment 4: The color of the engine oil after the engine speed experiment is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the initial engine speed is too small;

[0168] Result of Experiment 5: The first engine oil is not blackened, the second engine oil is not blackened, the third engine oil starts to turn black, the fourth engine oil is not blackened, the fifth engine oil is not blackened, and the sixth engine oil is blackened, so it is determined that the reason for the engine oil turning black is that the load is too large;

[0169] Result of Experiment 6: The color of the seventh engine oil is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the supercharger state is in boost; the blackening degree of the eighth engine oil to the eleventh engine oil gradually deepens. Since the temperature of the supercharger bearing becomes higher and higher as time goes by, it is determined that the reason for the engine oil turning black is the high temperature of the supercharger.

[0170] Result of Experiment 7: The color of the engine oil after the engine oil grade experiment is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the initial engine oil grade causes the engine oil to turn black;

[0171] Result of Experiment 8: The color of the engine oil after the piston assembly experiment is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the initial piston assembly size is too large;

[0172] Result of Experiment 9: The color of the engine oil after the experiment of eliminating the fault code is not blackened compared with the color of the initial engine oil, so it is determined that the reason for the engine oil turning black is that the engine oil turns black due to the low rail pressure fault;

[0173] Results of Experiment 10: The results of the soot component detection showed that the soot component content in the engine oil before the test run was 0. After multiple groups of experiments, the engine oil with a blackened color contained soot components. Moreover, the deeper the blackening degree, the higher the soot component content in the engine oil. It was confirmed that the reason for the blackening of the engine oil was the presence of soot in the engine oil.

[0174] The method for determining the reason for the blackening of the above-mentioned engine oil is as follows: By obtaining the initial test run data and the initial engine oil color. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the color of the engine oil after the test run experiment based on the initial test run data. That is, the initial test run data and the initial engine oil color are set as the test run experiment control group. The initial test run data includes at least one of the following parameters: the initial opening of the exhaust backpressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the turbocharger state, the initial engine oil grade, and the initial piston assembly size. Since the initial test run data includes various parameters that may affect the blackening of the engine oil color, by adjusting the parameters in the initial test run data respectively and conducting test run experiments after adjusting the various parameters that affect the blackening of the engine oil color, the colors of the engine oil after multiple groups of experiments are compared with the initial engine oil color of the test run experiment control group, and then it can be determined which parameter causes the blackening of the engine oil. Therefore, based on the above-mentioned multiple groups of test run experiment methods, the reason for the blackening of the diesel engine oil can be effectively identified.

[0175] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0176] Based on the same inventive concept, the embodiments of the present application also provide a device for determining the reason for the blackening of the engine oil for implementing the method for determining the reason for the blackening of the engine oil described above. The solution provided by this device for solving the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the device for determining the reason for the blackening of the engine oil provided below can refer to the limitations on the method for determining the reason for the blackening of the engine oil in the above text, and will not be repeated here.

[0177] In one embodiment, as Figure 12As shown in the figure, a device 100 for determining the cause of engine oil darkening is provided, including: an initial data acquisition module 120, a data adjustment module 140, and a test run experiment module 160, where:

[0178] The initial data acquisition module 120 is configured to acquire initial test run data and an initial engine oil color. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data.

[0179] The data adjustment module 140 is configured to adjust the parameters in the initial test run data respectively to obtain multiple sets of adjusted test run data. The initial test run data includes at least one of the following parameters: the initial opening degree of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size.

[0180] The test run experiment module 160 is configured to conduct a test run experiment for each set of the multiple sets of adjusted test run data to obtain multiple sets of engine oil colors after the experiment; compare the engine oil colors after the experiment corresponding to each set of the multiple sets of adjusted test run data with the initial engine oil color respectively to determine the cause of the engine oil darkening.

[0181] For the above device for determining the cause of engine oil darkening, by acquiring the initial test run data and the initial engine oil color, where the initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data, that is, the initial test run data and the initial engine oil color are set as the test run experiment control group; the initial test run data includes at least one of the following parameters: the initial opening degree of the exhaust back pressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size. Since the initial test run data includes various parameters that may affect the darkening of the engine oil color, by adjusting the parameters in the initial test run data respectively and conducting test run experiments after adjusting the various parameters that affect the darkening of the engine oil color, comparing the multiple sets of engine oil colors after the experiment with the initial engine oil color of the test run experiment control group respectively, and then determining which parameter causes the engine oil darkening. Therefore, the cause of the darkening of the diesel engine oil color can be effectively identified according to the above multiple sets of test run experiment methods.

[0182] In one embodiment, the data adjustment module 140 is further configured to: if the initial test drive data includes the initial opening degree of the exhaust backpressure valve, adjust the initial opening degree of the exhaust backpressure valve in the initial test drive data to a preset opening degree to obtain the adjusted opening degree of the exhaust backpressure valve, where the preset opening degree is greater than the initial opening degree of the exhaust backpressure valve, and the adjusted opening degree of the exhaust backpressure valve is one set of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the switch state of the exhaust gas recirculation system, adjust the switch state of the exhaust gas recirculation system in the initial test drive data to closed to obtain the adjusted switch state of the exhaust gas recirculation system, and the adjusted switch state of the exhaust gas recirculation system is one set of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the initial fuel injection advance angle, adjust the initial fuel injection advance angle in the initial test drive data to a preset fuel injection advance angle to obtain the adjusted fuel injection advance angle, where the preset fuel injection advance angle is greater than the initial fuel injection advance angle, and the adjusted fuel injection advance angle is one set of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the initial engine speed, adjust the initial engine speed in the initial test drive data to a preset engine speed to obtain the adjusted engine speed, where the adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the initial load amount, adjust the initial load amount in the initial test drive data to a first load amount and a second load amount respectively to obtain the first adjusted load amount and the second adjusted load amount, where the first adjusted load amount is greater than the load amount, the second adjusted load amount is greater than the first adjusted load amount, and the first adjusted load amount and the second adjusted load amount are two sets of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the supercharger state, adjust the supercharger state in the initial test drive data to natural aspiration to obtain the adjusted supercharger state, and the adjusted supercharger state is one set of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the initial engine oil grade, adjust the initial engine oil grade in the initial test drive data to a preset engine oil grade to obtain the adjusted engine oil grade, and the adjusted engine oil grade is one set of test drive data among multiple sets of adjusted test drive data; if the initial test drive data includes the initial piston assembly size, adjust the initial piston assembly size in the initial test drive data to a preset piston assembly size to obtain the adjusted piston assembly size, where the preset piston assembly size is smaller than the initial piston assembly size, and the adjusted piston assembly size is one set of test drive data among multiple sets of adjusted test drive data.

[0183] In one embodiment, the commissioning experiment module 160 is further configured to conduct a commissioning experiment for the adjusted exhaust backpressure valve opening, obtain the engine oil color after the exhaust backpressure experiment, and the engine oil color after the exhaust backpressure experiment is one of the engine oil colors after multiple experiments; compare the engine oil color after the exhaust backpressure experiment with the initial engine oil color; if the engine oil color after the exhaust backpressure experiment is not blackened compared with the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the initial opening of the exhaust backpressure valve is too small.

[0184] In one embodiment, the commissioning experiment module 160 is further configured to conduct a commissioning experiment for the adjusted exhaust gas recirculation system switch state, obtain the engine oil color after the experiment of closing the exhaust gas recirculation system, and the engine oil color after the experiment of closing the exhaust gas recirculation system is one of the engine oil colors after multiple experiments; compare the engine oil color after the experiment of closing the exhaust gas recirculation system with the initial engine oil color; if the engine oil color after the experiment of closing the exhaust gas recirculation system is not blackened compared with the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the switch state of the exhaust gas recirculation system is open.

[0185] In one embodiment, the commissioning experiment module 160 is further configured to conduct a commissioning experiment for the adjusted fuel injection advance angle, obtain the engine oil color after the fuel injection advance angle experiment, and the engine oil color after the fuel injection advance angle experiment is one of the engine oil colors after multiple experiments; compare the engine oil color after the fuel injection advance angle experiment with the initial engine oil color; if the engine oil color after the fuel injection advance angle experiment is not blackened compared with the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the initial fuel injection advance angle is too small.

[0186] In one embodiment, the commissioning experiment module 160 is further configured to conduct a commissioning experiment for the adjusted engine speed, obtain the engine oil color after the engine speed experiment, and the engine oil color after the engine speed experiment is one of the engine oil colors after multiple experiments; compare the engine oil color after the engine speed experiment with the initial engine oil color; if the engine oil color after the engine speed experiment is not blackened compared with the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the initial engine speed is too small.

[0187] In one embodiment, the test run experiment module 160 is further configured to conduct a test run experiment for the first adjusted load amount to obtain the oil color after the first load experiment, and conduct a test run experiment for the second adjusted load amount to obtain the oil color after the second load experiment. The oil color after the first load experiment and the oil color after the second load experiment are two sets of oil colors among the oil colors after multiple experiments respectively. Compare the oil color after the first load experiment and the oil color after the second load experiment with the initial oil color respectively. If the oil color after the first load experiment is significantly darker than the initial oil color, and the oil color after the second load experiment is significantly darker than the oil color after the first load experiment, it is determined that the reason for the oil color turning black is excessive load amount.

[0188] In one embodiment, the test run experiment module 160 is further configured to conduct a test run experiment for the adjusted supercharger state to obtain the oil color after the natural aspiration experiment. The oil color after the natural aspiration experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the natural aspiration experiment with the initial oil color. If the oil color after the natural aspiration experiment is not darker than the initial oil color, it is determined that the reason for the oil color turning black is that the supercharger state is supercharged.

[0189] In one embodiment, the test run experiment module 160 is further configured to conduct a test run experiment with the oil corresponding to the adjusted oil grade to obtain the oil color after the oil grade experiment. The oil color after the oil grade experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the oil grade experiment with the initial oil color. If the oil color after the oil grade experiment is not darker than the initial oil color, it is determined that the reason for the oil color turning black is that the initial oil grade causes the oil color to turn black.

[0190] In one embodiment, the test run experiment module 160 is further configured to conduct a test run experiment with the piston assembly corresponding to the adjusted piston assembly size to obtain the oil color after the piston assembly experiment. The oil color after the piston assembly experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the piston assembly experiment with the initial oil color. If the oil color after the piston assembly experiment is not darker than the initial oil color, it is determined that the reason for the oil color turning black is that the initial piston assembly size is too large.

[0191] Each module in the above device for determining the reason for the oil turning black can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or be independent of it, or be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above respective modules.

[0192] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structural diagram may be as shown in Figure 13 . The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store initial test drive data, initial oil color, multiple sets of adjusted test drive data, and multiple sets of oil colors after experiments. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a method for determining the cause of oil darkening.

[0193] Those skilled in the art can understand that Figure 13 the structure shown in is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0194] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the following steps are implemented:

[0195] Obtain initial test drive data and initial oil color. The initial test drive data is the initial electronic control data used during the test drive experiment, and the initial oil color is the oil color after the test drive experiment based on the initial test drive data;

[0196] Adjust the parameters in the initial test drive data respectively to obtain multiple sets of adjusted test drive data. The initial test drive data includes at least one of the following parameters: initial opening degree of the exhaust back pressure valve, switch state of the exhaust gas recirculation system, initial injection advance angle, initial engine speed, initial load, supercharger state, initial oil grade, and initial piston assembly size;

[0197] Conduct a test drive experiment for each set of test drive data in the multiple sets of adjusted test drive data to obtain multiple sets of oil colors after experiments; compare the oil colors after experiments corresponding to each set of test drive data in the multiple sets of adjusted test drive data with the initial oil color respectively to determine the cause of oil darkening.

[0198] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0199] If the initial commissioning data includes: the initial opening degree of the exhaust backpressure valve, then adjust the initial opening degree of the exhaust backpressure valve in the initial commissioning data to a preset opening degree to obtain the adjusted opening degree of the exhaust backpressure valve. The preset opening degree is greater than the initial opening degree of the exhaust backpressure valve, and the adjusted opening degree of the exhaust backpressure valve is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the switch state of the exhaust gas recirculation system, then adjust the switch state of the exhaust gas recirculation system in the initial commissioning data to closed to obtain the adjusted switch state of the exhaust gas recirculation system. The adjusted switch state of the exhaust gas recirculation system is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial fuel injection advance angle, then adjust the initial fuel injection advance angle in the initial commissioning data to a preset fuel injection advance angle to obtain the adjusted fuel injection advance angle. The preset fuel injection advance angle is greater than the initial fuel injection advance angle, and the adjusted fuel injection advance angle is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial engine speed, then adjust the initial engine speed in the initial commissioning data to a preset engine speed to obtain the adjusted engine speed. The adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial load, then adjust the initial load in the initial commissioning data to a first load and a second load respectively to obtain the first adjusted load and the second adjusted load. The first adjusted load is greater than the load, the second adjusted load is greater than the first adjusted load, and the first adjusted load and the second adjusted load are two sets of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the supercharger state, then adjust the supercharger state in the initial commissioning data to natural aspiration to obtain the adjusted supercharger state. The adjusted supercharger state is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial engine oil grade, then adjust the initial engine oil grade in the initial commissioning data to a preset engine oil grade to obtain the adjusted engine oil grade. The adjusted engine oil grade is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial piston assembly size, then adjust the initial piston assembly size in the initial commissioning data to a preset piston assembly size to obtain the adjusted piston assembly size. The preset piston assembly size is smaller than the initial piston assembly size, and the adjusted piston assembly size is one set of commissioning data among multiple sets of adjusted commissioning data.

[0200] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0201] Conduct a test drive experiment for the adjusted opening degree of the exhaust backpressure valve to obtain the oil color after the exhaust backpressure experiment. The oil color after the exhaust backpressure experiment is one of the oil colors in multiple experiments. Compare the oil color after the exhaust backpressure experiment with the initial oil color. If the oil color after the exhaust backpressure experiment is not blackened compared to the initial oil color, it is determined that the reason for the blackening of the oil color is that the initial opening degree of the exhaust backpressure valve is too small.

[0202] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0203] Conduct a test drive experiment for the adjusted switch state of the exhaust gas recirculation system to obtain the oil color after the experiment of closing the exhaust gas recirculation system. The oil color after the experiment of closing the exhaust gas recirculation system is one of the oil colors in multiple experiments. Compare the oil color after the experiment of closing the exhaust gas recirculation system with the initial oil color. If the oil color after the experiment of closing the exhaust gas recirculation system is not blackened compared to the initial oil color, it is determined that the reason for the blackening of the oil color is that the switch state of the exhaust gas recirculation system is open.

[0204] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0205] Conduct a test drive experiment for the adjusted fuel injection advance angle to obtain the oil color after the fuel injection advance angle experiment. The oil color after the fuel injection advance angle experiment is one of the oil colors in multiple experiments.

[0206] Compare the oil color after the fuel injection advance angle experiment with the initial oil color.

[0207] If the oil color after the fuel injection advance angle experiment is not blackened compared to the initial oil color, it is determined that the reason for the blackening of the oil color is that the initial fuel injection advance angle is too small.

[0208] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0209] Conduct a test drive experiment for the adjusted engine speed to obtain the oil color after the engine speed experiment. The oil color after the engine speed experiment is one of the oil colors in multiple experiments. Compare the oil color after the engine speed experiment with the initial oil color. If the oil color after the engine speed experiment is not blackened compared to the initial oil color, it is determined that the reason for the blackening of the oil color is that the initial engine speed is too small.

[0210] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0211] Conduct a test run experiment for the first adjusted load amount to obtain the oil color after the first load experiment. Conduct a test run experiment for the second adjusted load amount to obtain the oil color after the second load experiment. The oil color after the first load experiment and the oil color after the second load experiment are two sets of oil colors among the oil colors after multiple experiments respectively. Compare the oil color after the first load experiment and the oil color after the second load experiment with the initial oil color respectively. If the oil color after the first load experiment is significantly darker than the initial oil color, and the oil color after the second load experiment is significantly darker than the oil color after the first load experiment, then determine that the reason for the darkening of the oil color is excessive load amount.

[0212] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0213] Conduct a test run experiment for the adjusted supercharger state to obtain the oil color after the natural aspiration experiment. The oil color after the natural aspiration experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the natural aspiration experiment with the initial oil color. If the oil color after the natural aspiration experiment is not darker than the initial oil color, then determine that the reason for the darkening of the oil color is that the supercharger state is supercharged.

[0214] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0215] Conduct a test run experiment with the oil corresponding to the adjusted oil grade to obtain the oil color after the oil grade experiment. The oil color after the oil grade experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the oil grade experiment with the initial oil color. If the oil color after the oil grade experiment is not darker than the initial oil color, then determine that the reason for the darkening of the oil color is that the initial oil grade causes the oil color to darken.

[0216] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0217] Conduct a test run experiment with the piston assembly corresponding to the adjusted piston assembly size to obtain the oil color after the piston assembly experiment. The oil color after the piston assembly experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the piston assembly experiment with the initial oil color. If the oil color after the piston assembly experiment is not darker than the initial oil color, then determine that the reason for the darkening of the oil color is that the initial piston assembly size is too large.

[0218] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0219] Obtain the initial test run data and the initial oil color. The initial test run data is the initial electronic control data used during the test run experiment, and the initial oil color is the oil color after the test run experiment based on the initial test run data;

[0220] Adjust the parameters in the initial test run data respectively to obtain multiple sets of adjusted test run data. The initial test run data includes at least one of the following parameters: the initial opening of the exhaust backpressure valve, the switch state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the turbocharger state, the initial oil grade, and the initial piston assembly size;

[0221] Conduct a test run experiment for each set of the multiple sets of adjusted test run data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of the multiple sets of adjusted test run data with the initial oil color respectively to determine the reason for the oil turning black.

[0222] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0223] If the initial test run data includes: the initial opening degree of the exhaust back pressure valve, then adjust the initial opening degree of the exhaust back pressure valve in the initial test run data to a preset opening degree, obtain the adjusted opening degree of the exhaust back pressure valve, the preset opening degree is greater than the initial opening degree of the exhaust back pressure valve, and the adjusted opening degree of the exhaust back pressure valve is one set of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the on-off state of the exhaust gas recirculation system, then adjust the on-off state of the exhaust gas recirculation system in the initial test run data to closed, obtain the adjusted on-off state of the exhaust gas recirculation system, and the adjusted on-off state of the exhaust gas recirculation system is one set of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the initial injection advance angle, then adjust the initial injection advance angle in the initial test run data to a preset injection advance angle, obtain the adjusted injection advance angle, the preset injection advance angle is greater than the initial injection advance angle, and the adjusted injection advance angle is one set of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the initial engine speed, then adjust the initial engine speed in the initial test run data to a preset engine speed, obtain the adjusted engine speed, the adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the initial load, then adjust the initial load in the initial test run data to a first load and a second load respectively, obtain the first adjusted load and the second adjusted load, the first adjusted load is greater than the load, the second adjusted load is greater than the first adjusted load, and the first adjusted load and the second adjusted load are two sets of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the supercharger state, then adjust the supercharger state in the initial test run data to natural aspiration, obtain the adjusted supercharger state, and the adjusted supercharger state is one set of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the initial engine oil grade, then adjust the initial engine oil grade in the initial test run data to a preset engine oil grade, obtain the adjusted engine oil grade, and the adjusted engine oil grade is one set of test run data among multiple sets of adjusted test run data; if the initial test run data includes: the initial piston assembly size, then adjust the initial piston assembly size in the initial test run data to a preset piston assembly size, obtain the adjusted piston assembly size, the preset piston assembly size is less than the initial piston assembly size, and the adjusted piston assembly size is one set of test run data among multiple sets of adjusted test run data.

[0224] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0225] Conduct a test drive experiment for the adjusted opening degree of the exhaust backpressure valve to obtain the oil color after the exhaust backpressure experiment. The oil color after the exhaust backpressure experiment is one of the oil colors in multiple experiments. Compare the oil color after the exhaust backpressure experiment with the initial oil color. If the oil color after the exhaust backpressure experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial opening degree of the exhaust backpressure valve is too small.

[0226] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0227] Conduct a test drive experiment for the adjusted switch state of the exhaust gas recirculation system to obtain the oil color after the experiment of closing the exhaust gas recirculation system. The oil color after the experiment of closing the exhaust gas recirculation system is one of the oil colors in multiple experiments. Compare the oil color after the experiment of closing the exhaust gas recirculation system with the initial oil color. If the oil color after the experiment of closing the exhaust gas recirculation system is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the switch state of the exhaust gas recirculation system is open.

[0228] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0229] Conduct a test drive experiment for the adjusted fuel injection advance angle to obtain the oil color after the fuel injection advance angle experiment. The oil color after the fuel injection advance angle experiment is one of the oil colors in multiple experiments.

[0230] Compare the oil color after the fuel injection advance angle experiment with the initial oil color.

[0231] If the oil color after the fuel injection advance angle experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial fuel injection advance angle is too small.

[0232] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0233] Conduct a test drive experiment for the adjusted engine speed to obtain the oil color after the engine speed experiment. The oil color after the engine speed experiment is one of the oil colors in multiple experiments. Compare the oil color after the engine speed experiment with the initial oil color. If the oil color after the engine speed experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial engine speed is too small.

[0234] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0235] Conduct a test run experiment for the first adjusted load amount to obtain the oil color after the first load experiment. Conduct a test run experiment for the second adjusted load amount to obtain the oil color after the second load experiment. The oil color after the first load experiment and the oil color after the second load experiment are two sets of oil colors among the oil colors after multiple experiments respectively. Compare the oil color after the first load experiment and the oil color after the second load experiment with the initial oil color respectively. If the oil color after the first load experiment is significantly darker than the initial oil color, and the oil color after the second load experiment is significantly darker than the oil color after the first load experiment, then determine that the reason for the oil color turning black is that the load amount is too large.

[0236] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0237] Conduct a test run experiment for the adjusted supercharger state to obtain the oil color after the natural aspiration experiment. The oil color after the natural aspiration experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the natural aspiration experiment with the initial oil color. If the oil color after the natural aspiration experiment is not darker than the initial oil color, then determine that the reason for the oil color turning black is that the supercharger state is supercharged.

[0238] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0239] Conduct a test run experiment using the oil corresponding to the adjusted oil grade to obtain the oil color after the oil grade experiment. The oil color after the oil grade experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the oil grade experiment with the initial oil color. If the oil color after the oil grade experiment is not darker than the initial oil color, then determine that the reason for the oil color turning black is that the initial oil grade causes the oil color to turn black.

[0240] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0241] Conduct a test run experiment using the piston assembly corresponding to the adjusted piston assembly size to obtain the oil color after the piston assembly experiment. The oil color after the piston assembly experiment is one set of oil colors among the oil colors after multiple experiments. Compare the oil color after the piston assembly experiment with the initial oil color. If the oil color after the piston assembly experiment is not darker than the initial oil color, then determine that the reason for the oil color turning black is that the initial piston assembly size is too large.

[0242] In one embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by the processor, the following steps are implemented:

[0243] Obtain initial test run data and the initial engine oil color. The initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment is conducted based on the initial test run data;

[0244] Adjust the parameters in the initial test run data respectively to obtain multiple sets of adjusted test run data. The initial test run data includes at least one of the following parameters: initial opening degree of the exhaust back pressure valve, switch state of the exhaust gas recirculation system, initial fuel injection advance angle, initial engine speed, initial load, supercharger state, initial engine oil grade, and initial piston assembly size;

[0245] Conduct a test run experiment for each set of the multiple sets of adjusted test run data to obtain multiple sets of engine oil colors after the experiment; compare the engine oil colors after the experiment corresponding to each set of the multiple sets of adjusted test run data with the initial engine oil color respectively to determine the reason for the engine oil turning black.

[0246] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0247] If the initial commissioning data includes: the initial opening of the exhaust backpressure valve, then adjust the initial opening of the exhaust backpressure valve in the initial commissioning data to a preset opening to obtain the adjusted opening of the exhaust backpressure valve. The preset opening is greater than the initial opening of the exhaust backpressure valve, and the adjusted opening of the exhaust backpressure valve is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the on-off state of the exhaust gas recirculation system, then adjust the on-off state of the exhaust gas recirculation system in the initial commissioning data to the closed state to obtain the adjusted on-off state of the exhaust gas recirculation system. The adjusted on-off state of the exhaust gas recirculation system is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial fuel injection advance angle, then adjust the initial fuel injection advance angle in the initial commissioning data to a preset fuel injection advance angle to obtain the adjusted fuel injection advance angle. The preset fuel injection advance angle is greater than the initial fuel injection advance angle, and the adjusted fuel injection advance angle is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial engine speed, then adjust the initial engine speed in the initial commissioning data to a preset engine speed to obtain the adjusted engine speed. The adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial load, then adjust the initial load in the initial commissioning data to a first load and a second load respectively to obtain the first adjusted load and the second adjusted load. The first adjusted load is greater than the load, the second adjusted load is greater than the first adjusted load, and the first adjusted load and the second adjusted load are two sets of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the supercharger state, then adjust the supercharger state in the initial commissioning data to natural aspiration to obtain the adjusted supercharger state. The adjusted supercharger state is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial engine oil grade, then adjust the initial engine oil grade in the initial commissioning data to a preset engine oil grade to obtain the adjusted engine oil grade. The adjusted engine oil grade is one set of commissioning data among multiple sets of adjusted commissioning data; if the initial commissioning data includes: the initial piston assembly size, then adjust the initial piston assembly size in the initial commissioning data to a preset piston assembly size to obtain the adjusted piston assembly size. The preset piston assembly size is smaller than the initial piston assembly size, and the adjusted piston assembly size is one set of commissioning data among multiple sets of adjusted commissioning data.

[0248] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0249] Conduct a test drive experiment for the adjusted opening degree of the exhaust backpressure valve to obtain the oil color after the exhaust backpressure experiment. The oil color after the exhaust backpressure experiment is one of the oil colors in multiple experiments. Compare the oil color after the exhaust backpressure experiment with the initial oil color. If the oil color after the exhaust backpressure experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial opening degree of the exhaust backpressure valve is too small.

[0250] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0251] Conduct a test drive experiment for the adjusted switch state of the exhaust gas recirculation system to obtain the oil color after the experiment of closing the exhaust gas recirculation system. The oil color after the experiment of closing the exhaust gas recirculation system is one of the oil colors in multiple experiments. Compare the oil color after the experiment of closing the exhaust gas recirculation system with the initial oil color. If the oil color after the experiment of closing the exhaust gas recirculation system is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the switch state of the exhaust gas recirculation system is open.

[0252] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0253] Conduct a test drive experiment for the adjusted injection advance angle to obtain the oil color after the injection advance angle experiment. The oil color after the injection advance angle experiment is one of the oil colors in multiple experiments.

[0254] Compare the oil color after the injection advance angle experiment with the initial oil color.

[0255] If the oil color after the injection advance angle experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial injection advance angle is too small.

[0256] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0257] Conduct a test drive experiment for the adjusted engine speed to obtain the oil color after the engine speed experiment. The oil color after the engine speed experiment is one of the oil colors in multiple experiments. Compare the oil color after the engine speed experiment with the initial oil color. If the oil color after the engine speed experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial engine speed is too small.

[0258] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0259] Conduct a test run experiment for the first adjusted load, and obtain the oil color after the first load experiment. Conduct a test run experiment for the second adjusted load, and obtain the oil color after the second load experiment. The oil color after the first load experiment and the oil color after the second load experiment are two sets of oil colors among the oil colors after multiple experiments respectively; compare the oil color after the first load experiment and the oil color after the second load experiment with the initial oil color respectively; if the oil color after the first load experiment is significantly darker than the initial oil color, and the oil color after the second load experiment is significantly darker than the oil color after the first load experiment, then determine that the reason for the oil color turning black is excessive load.

[0260] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0261] Conduct a test run experiment for the adjusted supercharger state, and obtain the oil color after the natural aspiration experiment. The oil color after the natural aspiration experiment is one set of oil colors among the oil colors after multiple experiments; compare the oil color after the natural aspiration experiment with the initial oil color; if the oil color after the natural aspiration experiment is not darker than the initial oil color, then determine that the reason for the oil color turning black is that the supercharger state is supercharged.

[0262] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0263] Conduct a test run experiment with the oil corresponding to the adjusted oil grade, and obtain the oil color after the oil grade experiment. The oil color after the oil grade experiment is one set of oil colors among the oil colors after multiple experiments; compare the oil color after the oil grade experiment with the initial oil color; if the oil color after the oil grade experiment is not darker than the initial oil color, then determine that the reason for the oil color turning black is that the initial oil grade causes the oil color to turn black.

[0264] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0265] Conduct a test run experiment with the piston assembly corresponding to the adjusted piston assembly size, and obtain the oil color after the piston assembly experiment. The oil color after the piston assembly experiment is one set of oil colors among the oil colors after multiple experiments; compare the oil color after the piston assembly experiment with the initial oil color; if the oil color after the piston assembly experiment is not darker than the initial oil color, then determine that the reason for the oil color turning black is that the initial piston assembly size is too large.

[0266] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data that have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with the relevant laws, regulations, and standards of relevant countries and regions.

[0267] Those of ordinary skill in the art can understand that all or part of the processes of the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in this application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., and are not limited thereto.

[0268] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0269] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A method for determining the cause of engine oil darkening, characterized in that The method includes: obtaining initial test run data and an initial engine oil color, where the initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data; Adjusting the parameters in the initial test run data respectively to obtain multiple sets of adjusted test run data. The initial test run data includes at least one of the following parameters: the initial opening degree of the exhaust backpressure valve, the on / off state of the exhaust gas recirculation system, the initial injection advance angle, the initial engine speed, the initial load, the supercharger state, the initial engine oil grade, and the initial piston assembly size; Conducting a test run experiment for each set of the multiple sets of adjusted test run data to obtain multiple sets of engine oil colors after the experiments; comparing the engine oil colors after the experiments corresponding to each set of the multiple sets of adjusted test run data with the initial engine oil color respectively to determine the reason for the engine oil turning black.

2. The method for determining the reason for the blackening of engine oil according to claim 1, wherein The adjusting the parameters in the initial test run data respectively to obtain multiple sets of adjusted test run data includes: If the initial test run data includes the initial opening degree of the exhaust backpressure valve, then adjusting the initial opening degree of the exhaust backpressure valve in the initial test run data to a preset opening degree to obtain an adjusted opening degree of the exhaust backpressure valve. The preset opening degree is greater than the initial opening degree of the exhaust backpressure valve, and the adjusted opening degree of the exhaust backpressure valve is one set of test run data among the multiple sets of adjusted test run data; If the initial test run data includes the on / off state of the exhaust gas recirculation system, then adjusting the on / off state of the exhaust gas recirculation system in the initial test run data to the closed state to obtain an adjusted on / off state of the exhaust gas recirculation system. The adjusted on / off state of the exhaust gas recirculation system is one set of test run data among the multiple sets of adjusted test run data; If the initial test run data includes the initial injection advance angle, then adjusting the initial injection advance angle in the initial test run data to a preset injection advance angle to obtain an adjusted injection advance angle. The preset injection advance angle is greater than the initial injection advance angle, and the adjusted injection advance angle is one set of test run data among the multiple sets of adjusted test run data; If the initial test run data includes the initial engine speed, then adjusting the initial engine speed in the initial test run data to a preset engine speed to obtain an adjusted engine speed. The adjusted engine speed is greater than the preset engine speed, and the adjusted engine speed is one set of test run data among the multiple sets of adjusted test run data; If the initial test run data includes the initial load, then adjusting the initial load in the initial test run data to a first load and a second load respectively to obtain a first adjusted load and a second adjusted load. The first adjusted load is greater than the load, the second adjusted load is greater than the first adjusted load, and the first adjusted load and the second adjusted load are two sets of test run data among the multiple sets of adjusted test run data; If the initial commissioning data includes the supercharger status, then adjust the supercharger status in the initial commissioning data to natural aspiration to obtain the adjusted supercharger status, and the adjusted supercharger status is one set of commissioning data among the multiple sets of adjusted commissioning data; If the initial commissioning data includes the initial oil grade, then adjust the initial oil grade in the initial commissioning data to the preset oil grade to obtain the adjusted oil grade, and the adjusted oil grade is one set of commissioning data among the multiple sets of adjusted commissioning data; If the initial commissioning data includes the initial piston assembly size, then adjust the initial piston assembly size in the initial commissioning data to the preset piston assembly size to obtain the adjusted piston assembly size, where the preset piston assembly size is smaller than the initial piston assembly size, and the adjusted piston assembly size is one set of commissioning data among the multiple sets of adjusted commissioning data.

3. The method for determining the reason for the blackening of engine oil according to claim 2, characterized in that, Conduct a commissioning experiment for each set of the multiple sets of adjusted commissioning data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of the multiple sets of adjusted commissioning data with the initial oil color respectively, and determine that the reasons for the oil turning black include: Conduct a commissioning experiment for the adjusted exhaust backpressure valve opening degree to obtain the oil color after the exhaust backpressure experiment, and the oil color after the exhaust backpressure experiment is one set of oil colors among the multiple sets of oil colors after the experiment; Compare the oil color after the exhaust backpressure experiment with the initial oil color; If the oil color after the exhaust backpressure experiment is not blackened compared with the initial oil color, then determine that the reason for the oil turning black is that the initial opening degree of the exhaust backpressure valve is too small.

4. The method for determining the cause of the engine oil turning black according to claim 2, characterized in that, Conduct a commissioning experiment for each set of the multiple sets of adjusted commissioning data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of the multiple sets of adjusted commissioning data with the initial oil color respectively, and determine that the reasons for the oil turning black also include: Conduct a commissioning experiment for the adjusted exhaust gas recirculation system switch state to obtain the oil color after the experiment of closing the exhaust gas recirculation system, and the oil color after the experiment of closing the exhaust gas recirculation system is one set of oil colors among the multiple sets of oil colors after the experiment; Compare the oil color after the experiment of closing the exhaust gas recirculation system with the initial oil color; If the oil color after the experiment of closing the exhaust gas recirculation system is not blackened compared with the initial oil color, then determine that the reason for the oil turning black is that the switch state of the exhaust gas recirculation system is open.

5. The method for determining the reason for the blackening of engine oil according to claim 2, wherein Conduct a commissioning experiment for each set of the multiple sets of adjusted commissioning data to obtain multiple sets of oil colors after the experiment; compare the oil colors after the experiment corresponding to each set of the multiple sets of adjusted commissioning data with the initial oil color respectively, and determine that the reasons for the oil turning black also include: Conduct a test run experiment for the adjusted fuel injection advance angle to obtain the oil color after the fuel injection advance angle experiment. The oil color after the fuel injection advance angle experiment is one of the oil colors in the oil colors after the multiple groups of experiments. Compare the oil color after the fuel injection advance angle experiment with the initial oil color. If the oil color after the fuel injection advance angle experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial fuel injection advance angle is too small.

6. The method for determining the reason for the blackening of engine oil according to claim 2, characterized in that, Conduct a test run experiment for each set of test run data in the multiple groups of adjusted test run data to obtain the oil colors after multiple groups of experiments. Compare the oil colors after the experiments corresponding to each set of test run data in the multiple groups of adjusted test run data with the initial oil color respectively. The reasons for the blackening of the oil also include: Conduct a test run experiment for the adjusted engine speed to obtain the oil color after the engine speed experiment. The oil color after the engine speed experiment is one of the oil colors in the oil colors after the multiple groups of experiments. Compare the oil color after the engine speed experiment with the initial oil color. If the oil color after the engine speed experiment is not blackened compared to the initial oil color, determine that the reason for the blackening of the oil color is that the initial engine speed is too small.

7. The method for determining the reason for the blackening of engine oil according to claim 2, wherein Conduct a test run experiment for each set of test run data in the multiple groups of adjusted test run data to obtain the oil colors after multiple groups of experiments. Compare the oil colors after the experiments corresponding to each set of test run data in the multiple groups of adjusted test run data with the initial oil color respectively. The reasons for the blackening of the oil also include: Conduct a test run experiment for the first adjusted load to obtain the oil color after the first load experiment, and conduct a test run experiment for the second adjusted load to obtain the oil color after the second load experiment. The oil color after the first load experiment and the oil color after the second load experiment are two of the oil colors in the oil colors after the multiple groups of experiments respectively. Compare the oil color after the first load experiment and the oil color after the second load experiment with the initial oil color respectively. If the oil color after the first load experiment is more significantly blackened compared to the initial oil color, and the oil color after the second load experiment is more significantly blackened compared to the oil color after the first load experiment, determine that the reason for the blackening of the oil color is that the load is too large.

8. The method for determining the reason for the blackening of engine oil according to claim 2, characterized in that, Conduct a test run experiment for each set of test run data in the multiple groups of adjusted test run data to obtain the oil colors after multiple groups of experiments. Compare the oil colors after the experiments corresponding to each set of test run data in the multiple groups of adjusted test run data with the initial oil color respectively. The reasons for the blackening of the oil also include: Conduct a test run experiment for the adjusted supercharger state to obtain the oil color after the natural aspiration experiment. The oil color after the natural aspiration experiment is one of the oil colors in the oil colors after the multiple groups of experiments. Compare the oil color after the natural aspiration experiment with the initial oil color. If the color of the engine oil after the naturally aspirated experiment is not blackened compared to the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the supercharger is in the boosted state.

9. The method for determining the reason for the blackening of engine oil according to claim 2, wherein For each set of the adjusted test run data among the multiple sets of adjusted test run data, a test run experiment is conducted to obtain the engine oil colors after multiple experiments; the engine oil colors after the experiments corresponding to each set of the adjusted test run data among the multiple sets of adjusted test run data are respectively compared with the initial engine oil color, and it is determined that the reasons for the blackening of the engine oil also include: A test run experiment is conducted using the engine oil corresponding to the adjusted engine oil grade to obtain the engine oil color after the engine oil grade experiment, and the engine oil color after the engine oil grade experiment is one of the engine oil colors after the multiple experiments. The engine oil color after the engine oil grade experiment is compared with the initial engine oil color. If the engine oil color after the engine oil grade experiment is not blackened compared to the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the initial engine oil grade causes the engine oil color to blacken.

10. The method for determining the reason for the blackening of engine oil according to claim 2, characterized in that, For each set of the adjusted test run data among the multiple sets of adjusted test run data, a test run experiment is conducted to obtain the engine oil colors after multiple experiments; the engine oil colors after the experiments corresponding to each set of the adjusted test run data among the multiple sets of adjusted test run data are respectively compared with the initial engine oil color, and it is determined that the reasons for the blackening of the engine oil also include: A test run experiment is conducted using the piston assembly corresponding to the adjusted piston assembly size to obtain the engine oil color after the piston assembly experiment, and the engine oil color after the piston assembly experiment is one of the engine oil colors after the multiple experiments. The engine oil color after the piston assembly experiment is compared with the initial engine oil color. If the engine oil color after the piston assembly experiment is not blackened compared to the initial engine oil color, it is determined that the reason for the blackening of the engine oil color is that the initial piston assembly size is too large.

11. An apparatus for determining the cause of engine oil darkening, characterized in that, The device includes: An initial data acquisition module, configured to acquire initial test run data and an initial engine oil color, where the initial test run data is the initial electronic control data used during the test run experiment, and the initial engine oil color is the engine oil color after the test run experiment based on the initial test run data. A data adjustment module, configured to respectively adjust the parameters in the initial test run data to obtain multiple sets of adjusted test run data, where the initial test run data includes at least one of the following parameters: initial opening degree of the exhaust backpressure valve, switch state of the exhaust gas recirculation system, initial injection advance angle, initial engine speed, initial load, supercharger state, initial engine oil grade, and initial piston assembly size. A test run experiment module, configured to conduct a test run experiment for each set of the adjusted test run data among the multiple sets of adjusted test run data to obtain the engine oil colors after multiple experiments; the engine oil colors after the experiments corresponding to each set of the adjusted test run data among the multiple sets of adjusted test run data are respectively compared with the initial engine oil color to determine the reasons for the blackening of the engine oil.

12. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 10 are implemented.

13. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 10 are implemented.

14. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 10.

Images