Testing device and testing method for testing oil carrying capacity of engine

Abstract

The invention relates to a testing device and method for testing the engine oil carrying capacity of an engine, and the device comprises a first pipeline, one end of which is used for communicating with the output end of the engine; a main pipe opening of the three-way control valve is communicated with the other end of the first pipeline; one end of the second pipeline is communicated with a first branch pipe opening of the three-way control valve, the other end of the second pipeline is used for being communicated with a supercharger, and the second pipeline is provided with a separator; one end of the third pipeline is communicated with the second branch pipe orifice of the three-way control valve, and the other end of the third pipeline is used for being communicated between the separator and the supercharger. By comparing the weight difference of the filter element before and after the test, the specific value of the engine oil carrying capacity can be accurately calculated. The test process is carried out in the actual working state of the engine, and the influence of the supercharger as a crankcase ventilation power source is considered, so that the test result is more accurate and reliable.

Description

Technical Field

[0001] The present application relates to the field of engine oil carrying capacity testing, and in particular to a testing device and a testing method for testing engine oil carrying capacity. Background Art

[0002] In recent years, as automobile emission requirements have become increasingly stringent, closed crankcase ventilation systems have become an inevitable choice for engines. However, for turbocharged engines, the oil coming out of the crankcase ventilation system will not only contaminate the supercharger blades, causing performance degradation, but may also affect the dynamic balance of the blades and produce abnormal noise. For the supercharger, it has a certain oil resistance, so an important indicator of the crankcase ventilation system is the oil carrying capacity.

[0003] In the related art, traditional testing devices are usually designed to be relatively simple. When testing the amount of oil carried by an engine, there are problems such as insufficient test accuracy, inability to simulate actual working conditions, low test efficiency, and inability to accurately measure the amount of oil carried. Summary of the invention

[0004] The present application provides a test device and a test method for testing the oil carrying capacity of an engine, which can solve the problems that traditional test devices are usually simple in design, have insufficient test accuracy, cannot simulate actual working conditions, have low test efficiency, and cannot accurately measure the oil carrying capacity when testing the oil carrying capacity of the engine.

[0005] In a first aspect, an embodiment of the present application provides a testing device for testing the amount of oil carried by an engine, comprising:

[0006] A first pipeline, one end of which is used to communicate with an output end of the engine;

[0007] A three-way control valve, the main port of the three-way control valve is connected to the other end of the first pipeline;

[0008] a second pipeline, one end of which is communicated with the first branch pipe port of the three-way control valve, and the other end of which is used to communicate with the supercharger, and the second pipeline is installed with a separator;

[0009] A third pipeline, one end of which is communicated with the second branch pipe port of the three-way control valve, and the other end of which is used to communicate between the separator and the supercharger.

[0010] In combination with the first aspect, in one implementation, the testing device for testing the amount of engine oil carried further includes:

[0011] A pressure gauge is used to monitor the pressure value of the crankcase ventilation system of the engine.

[0012] In a second aspect, the embodiments of the present application provide a testing method for a testing device for testing the amount of engine oil carried as described in some of the above embodiments, which comprises:

[0013] If the monitored engine reaches the test condition, the engine test condition is started, the main port of the three-way control valve is controlled to be connected with the first branch port, and the timing is started;

[0014] If the monitoring engine test condition ends, the main pipe port of the three-way control valve is controlled to be connected with the second branch pipe port, and the timing ends;

[0015] The oil carryover is calculated based on the timing duration and the difference in filter element weight before and after the separator test.

[0016] In combination with the second aspect, in one embodiment, before the monitoring engine reaches the test condition, starting the engine test condition, controlling the main port of the three-way control valve to be connected to the first branch port, and starting the timing, it also includes:

[0017] The main pipe port of the three-way control valve is controlled to communicate with the second branch pipe port, and the engine heat engine is controlled.

[0018] In conjunction with the second aspect, in one embodiment, after calculating the oil carrying amount based on the timing duration and the weight difference of the filter element before and after the separator test, the method further includes:

[0019] Repeat the steps for multiple times. If the monitored engine meets the test conditions, start the engine test condition, control the main port of the three-way control valve to be connected to the first branch port, and start timing. If the monitored engine test condition ends, control the main port of the three-way control valve to be connected to the second branch port, and end timing. Calculate the oil carryover based on the timing duration and the weight difference of the filter element before and after the separator test.

[0020] Based on the multiple calculations of the oil carryover amount, an average value of the oil carryover amount is obtained as the final oil carryover amount.

[0021] In combination with the second aspect, in one embodiment, if the monitored engine reaches the test condition, the engine test condition is started, the main port of the three-way control valve is controlled to be connected to the first branch port, and timing is started, including:

[0022] If the monitored engine reaches the test condition, the engine test condition is started, the main port of the three-way control valve is controlled to be connected with the first branch port, and the timing is started;

[0023] Monitor the engine's operating parameters in real time to ensure that the engine maintains stable operation during the test. If abnormal engine operating parameters are detected, stop the test immediately.

[0024] In conjunction with the second aspect, in one implementation, the real-time monitoring of the engine operating parameters to ensure that the engine maintains stable operation during the test, and if the engine operating parameters are detected to be abnormal, the test is stopped immediately, including:

[0025] Monitor the value of the pressure gauge in real time when the engine is running. If the value of the pressure gauge exceeds the set pressure value, stop the test immediately.

[0026] In combination with the second aspect, in one embodiment, before the monitoring engine reaches the test condition, starting the engine test condition, controlling the main port of the three-way control valve to be connected to the first branch port, and starting the timing, it also includes:

[0027] The separator is controlled to undergo preheating to ensure that the separator is in the best working condition during the test.

[0028] In conjunction with the second aspect, in one embodiment, after calculating the oil carrying amount based on the timing duration and the weight difference of the filter element before and after the separator test, the method further includes:

[0029] Use cleaning agent to clean the separator, three-way control valve, first pipeline, second pipeline and third pipeline to ensure cleanliness and accuracy during the next test.

[0030] In conjunction with the second aspect, in one implementation, the oil carrying amount is calculated based on the timing duration and the weight difference of the filter element before and after the separator test, including:

[0031] Based on the material of the separator filter and the length of use, a filter adsorption correction coefficient is set, and the calculated oil carrying amount is corrected as the final oil carrying amount.

[0032] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0033] By adjusting the three-way control valve, the crankcase ventilation is first carried out along the third pipeline, and the hot engine operation is carried out to ensure that the engine meets the test conditions. When the engine meets the test conditions, the engine test condition is started, and the three-way control valve is adjusted to enter the second pipeline at the same time, and the timing is started, ensuring that the test process is carried out under the actual working state of the engine and improving the accuracy of the test. When the crankcase pressure reaches the limit or the test condition ends, the three-way control valve is switched to allow the crankcase ventilation to proceed along the third pipeline again, and the timing is ended at the same time, ensuring the integrity and controllability of the test process. After shutdown, the separator is taken out, and the filter element of the separator is dried and weighed. By comparing the weight difference of the filter element before and after the test, the specific value of the oil carrying amount can be accurately calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic diagram of the structure of a test device for testing the amount of engine oil carried;

[0036] Figure 2 A flow chart of the test method for testing the amount of engine oil carried.

[0037] In the figure: 1. first pipeline; 2. three-way control valve; 3. second pipeline; 4. separator; 5. third pipeline; 6. pressure gauge; 7. engine; 8. supercharger. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The embodiments of the present application provide a test device and a test method for testing the oil carrying capacity of an engine, which can solve the problems that traditional test devices are usually simple in design, have insufficient test accuracy, cannot simulate actual working conditions, have low test efficiency, and cannot accurately measure the oil carrying capacity when testing the oil carrying capacity of an engine.

[0040] First, as Figure 1 As shown, an embodiment of the present application provides a test device for testing the amount of engine oil carried, which includes: a first pipeline 1, one end of the first pipeline 1 is used to communicate with the output end of the engine 7; a three-way control valve 2, the main port of the three-way control valve 2 is connected to the other end of the first pipeline 1; a second pipeline 3, one end of the second pipeline 3 is connected to the first branch pipe port of the three-way control valve 2, and the other end thereof is used to communicate with the supercharger 8, and the second pipeline 3 is installed with a separator 4; a third pipeline 5, one end of the third pipeline 5 is connected to the second branch pipe port of the three-way control valve 2, and the other end thereof is used to connect between the separator 4 and the supercharger 8.

[0041] In this embodiment, one end of the first pipeline 1 is connected to the output end of the engine 7, ensuring that the crankcase oil-gas mixture when the engine 7 is working can be directly obtained, providing a real sample for subsequent tests; the three-way control valve 2 is the core component of the testing device, and its main port is connected to the other end of the first pipeline 1. It also has two branch pipe ports, which are respectively connected to the second pipeline 3 and the third pipeline 5. By adjusting the switching state of the three-way control valve 2, the crankcase ventilation path can be flexibly controlled to meet different testing requirements. One end of the second pipeline 3 is connected to the first branch pipe port of the three-way control valve 2, and the other end is connected to the supercharger 8. In particular, a separator 4 is installed in the second pipeline 3. The separator 4 can efficiently separate the oil and gas in the oil-gas mixture to ensure accurate measurement of the oil carrying amount. By adjusting the three-way control valve 2, the crankcase ventilation is first carried out along the third pipeline 5, and the hot engine operation is performed to ensure that the engine 7 meets the test conditions. When the engine 7 meets the test conditions, the engine 7 test condition is started, and the three-way control valve 2 is adjusted to enter the second pipeline 3 at the same time, and the timing is started. This step ensures that the test process is carried out under the actual working state of the engine, thereby improving the accuracy of the test. When the crankcase pressure reaches the limit or the test condition ends, the three-way control valve 2 is switched to allow the crankcase ventilation to be carried out along the third pipeline 5 again, and the timing is ended, ensuring the integrity and controllability of the test process. After shutdown, the separator 4 is taken out, and the filter element is dried and weighed. By comparing the weight difference of the filter element before and after the test, the specific value of the oil carrying amount can be accurately calculated. The test process is carried out under the actual working state of the engine, and the influence of the supercharger as the crankcase ventilation power source is taken into account, so that the test results are more accurate and reliable. The improved test device is reasonably designed and easy to operate. By adjusting the switching state of the three-way control valve 2, the switching of the test path and the control of the test process can be easily achieved. The test process is clear and easy to master and execute.

[0042] In combination with the first aspect, in one implementation, the testing device for testing the amount of engine oil carried further includes: a pressure gauge 6 , which is used to monitor the pressure value of the crankcase ventilation system of the engine 7 .

[0043] In this embodiment, the pressure gauge 6 is installed in a pipeline connected to the crankcase ventilation system of the engine 7, and is used to monitor the pressure value of the crankcase ventilation system in real time. Through the reading of the pressure gauge 6, the working state of the crankcase ventilation system can be intuitively understood, including whether the pressure is normal, whether there is leakage and other problems. Monitoring the pressure value of the crankcase ventilation system helps to understand the working state of the engine 7 more comprehensively, so as to more accurately evaluate the oil carrying amount. If the pressure of the crankcase ventilation system is abnormal, it may affect the carrying and separation effect of the oil, and then affect the accuracy of the test results. Through the monitoring of the pressure gauge 6, these problems can be discovered and corrected in time, thereby improving the accuracy of the test.

[0044] Second, as Figure 2 As shown, the embodiment of the present application provides a testing method for a testing device for testing the amount of engine oil carried as mentioned in some of the above embodiments, which includes:

[0045] S100: If the monitored engine 7 meets the test condition, the engine 7 is started to test the working condition, the main port of the three-way control valve 2 is controlled to be connected with the first branch port, and the timing is started;

[0046] S200: If the test condition of the monitoring engine 7 is finished, the main port of the three-way control valve 2 is controlled to be connected with the second branch port, and the timing is ended;

[0047] S300: Calculate the amount of oil carried based on the timing duration and the weight difference of the filter element before and after the test of the separator 4.

[0048] In this embodiment, S100, first, the system monitors whether the engine 7 reaches the preset test conditions (these conditions include parameters such as engine temperature, oil pressure, and speed reaching a stable state). When the engine 7 meets the test conditions, the engine test condition is started, and the three-way control valve 2 is controlled at the same time to connect its main port with the first branch port, so that the gas output by the engine will flow through the second pipeline 3 and the separator 4. From the moment the engine test condition is started, the system starts timing to record the total duration of the test process; S200 continuously monitors the test condition of the engine 7, and when the preset end condition is reached (such as the test time reaches the set value, the engine parameter reaches a specific state, etc.), the test condition is ended, and the three-way control valve 2 is controlled to connect its main port with the second branch port, so that the gas output by the engine will no longer flow through the separator 4, but directly flow to the supercharger 8 through the third pipeline 5. At the same time, the system stops timing and records the total duration of the test process. S300 measures the weight of the filter element in the separator 4 before and after the test. The weight of the filter element after the test will increase due to the adsorption of engine oil. Based on the test duration and the weight difference of the filter element before and after the test, the amount of engine oil carried can be calculated. The specific calculation method is to divide the weight difference by the test duration to obtain the amount of engine oil carried per unit time. By accurately controlling the start and end of the test conditions and accurately measuring the weight difference of the filter element and the test duration, this test method can more accurately calculate the amount of engine oil carried; by adjusting the test conditions and test duration of the engine 7, different actual working conditions can be simulated, making the test results more representative and practical; this test method mainly relies on the automatic control system to complete, reducing manual intervention and improving the efficiency and accuracy of the test.

[0049] In conjunction with the second aspect, in one implementation, before S100, the following steps are further included:

[0050] S000: Control the main pipe port of the three-way control valve 2 to communicate with the second branch pipe port, and control the engine 7 to heat up.

[0051] In this embodiment, first, the three-way control valve 2 is controlled to connect its main pipe port with the second branch pipe port, so that the gas output by the engine 7 will flow directly to the supercharger 8 through the third pipe 5 without passing through the separator 4; the engine 7 is started and controlled to run at a lower load or idle state for a period of time to perform a warm-up. The warm-up process helps the engine to reach a stable working state and reduce abnormal wear or oil carryover caused by cold start. Through the warm-up process of step S000, the engine 7 can reach a more stable working state, reducing the uncertainty factors caused by cold start, such as uneven oil distribution and temperature fluctuations, thereby improving the accuracy of subsequent tests. The warm-up process also helps the oil and various engine components reach an appropriate temperature, so that the oil carryover is closer to the level during actual operation.

[0052] In conjunction with the second aspect, in one implementation, after S300, the following steps are further included:

[0053] S400: Repeat the steps for multiple times. If the monitoring engine 7 reaches the test condition, start the engine 7 test condition, control the main port of the three-way control valve 2 to be connected to the first branch port, and start timing; if the monitoring engine 7 test condition ends, control the main port of the three-way control valve 2 to be connected to the second branch port, and end timing; calculate the oil carrying amount based on the timing duration and the weight difference of the filter element before and after the test of the separator 4;

[0054] S500: Based on the multiple calculations of the oil carrying amount, an average value of the oil carrying amount is obtained as a final oil carrying amount.

[0055] In this embodiment, steps S100 to S300 are repeatedly executed to perform multiple tests. Each test should ensure that the engine 7 reaches the same test conditions and is operated strictly in accordance with the test process. The oil carrying amount calculated by multiple tests is averaged and used as the final oil carrying amount. The average value can more effectively reflect the oil carrying situation of the engine 7 in actual operation and reduce the impact of accidental errors. By repeating the test multiple times and calculating the average value, the accidental errors in a single test can be significantly reduced, and the accuracy and reliability of the test results can be improved. Multiple tests can also help identify and eliminate possible abnormal values ​​or erroneous data to ensure the accuracy of the final result. The average value is the final result, which is more representative and stable and can more truly reflect the oil carrying characteristics of the engine 7.

[0056] In conjunction with the second aspect, in one implementation, in S100, the following steps are also included:

[0057] S101: If the monitoring engine 7 meets the test conditions, the engine 7 is started to test the working condition, the main port of the three-way control valve 2 is controlled to be connected with the first branch port, and the timing is started.

[0058] S102: Monitor the operating parameters of the engine 7 in real time to ensure that the engine 7 maintains stable operation during the test. If the operating parameters of the engine 7 are detected to be abnormal, stop the test immediately.

[0059] In this embodiment, when the engine 7 meets the test conditions, the engine 7 test condition is started, the three-way control valve 2 is controlled to connect the main pipe port with the first branch pipe port, the gas output by the engine flows through the separator 4, and the timing is started to record the total duration of the test process. During the test, the operating parameters of the engine 7, such as speed, temperature, oil pressure, intake volume, exhaust volume, etc., are monitored in real time. Through data analysis or preset threshold judgment, it is ensured that the engine 7 maintains stable operation during the test. If any operating parameter of the engine 7 is detected to be abnormal, such as a sudden increase or decrease, exceeding the preset safety range, the test is stopped immediately to ensure the safety of the engine and the equipment.

[0060] In conjunction with the second aspect, in one implementation, in S102, the following steps are also included:

[0061] S102-1: Real-time monitoring of the value of the pressure gauge 6 when the engine 7 is running. If the value of the pressure gauge 6 exceeds the set pressure value, the test is stopped immediately.

[0062] In this embodiment, by real-time monitoring of the value of the pressure gauge 6, it is possible to promptly detect whether the engine 7 is abnormal. Once the value of the pressure gauge 6 exceeds the set pressure value, it indicates that the engine 7 may be in an overload or fault state. At this time, the test is stopped immediately, which can effectively avoid damage to the engine 7 and also ensure the accuracy and reliability of the test data.

[0063] In conjunction with the second aspect, in one implementation, before S100, the following steps are further included:

[0064] S000: Control the separator 4 to perform preheating treatment to ensure that the separator 4 is in the best working state during the test.

[0065] In this embodiment, S000 separator preheating treatment, before starting the engine 7 test, first control the separator 4 to perform preheating treatment, which can be achieved by heating the outside of the separator 4 to ensure that the separator 4 is in the best working condition during the test. The preheating treatment can remove moisture, condensate or impurities inside the separator 4, improve the separation efficiency, and preheating can also make the material and structure of the separator 4 reach an appropriate temperature, reducing performance changes or damage caused by sudden temperature changes.

[0066] Exemplarily, the separator 4 is placed in a heating device, such as a heating box or a heating furnace, to ensure that the heating device can evenly and stably provide the required preheating temperature; during the preheating process, a thermometer or a temperature sensor is used to monitor the temperature of the separator 4 in real time to ensure that the temperature remains within a set range and avoids exceeding the tolerance temperature of the separator 4.

[0067] The separator preheating step S000 may be performed before or after the heat treatment of the engine 7 in step S000 in one embodiment.

[0068] In conjunction with the second aspect, in one implementation, after S300, the following steps are further included:

[0069] S400: Use a cleaning agent to clean the separator 4, the three-way control valve 2, the first pipeline 1, the second pipeline 3 and the third pipeline 5 to ensure cleanliness and accuracy during the next test.

[0070] In this embodiment, specifically, step S400 involves using a cleaning agent to thoroughly clean the separator 4, the three-way control valve 2, the first pipeline 1, the second pipeline 3, and the third pipeline 5. These components may have some residual oil, impurities, or sediments during the test. If they are not cleaned in time, the accuracy and reliability of the next test may be affected. During the cleaning process, it should be ensured that the cleaning agent can fully contact each surface of the component, and all dirt and residues are removed by appropriate flushing and scrubbing. After cleaning, the components should also be dried to prevent residual moisture from interfering with the next test. Through the cleaning process of step S400, it can be ensured that the separator 4, the three-way control valve 2, the first pipeline 1, the second pipeline 3, and the third pipeline 5 are in the best state during the next test, thereby improving the accuracy and reliability of the test.

[0071] In conjunction with the second aspect, in one implementation, in S300, the following steps are further included:

[0072] S301: Based on the material and usage time of the filter element of the separator 4, a filter element adsorption correction coefficient is set, and the calculated oil carrying amount is corrected as the final oil carrying amount.

[0073] In this embodiment, specifically, the material and usage time of the filter element will affect its ability to absorb engine oil. For example, filter elements of certain materials may be more likely to absorb engine oil, while filter elements that have been used for a long time may have reduced adsorption capacity due to saturation or aging. Therefore, in order to more accurately reflect the actual oil carrying capacity, it is necessary to set a correction factor based on the material and usage time of the filter element. This correction factor can be determined through experiments or empirical data. For example, filter elements of different materials and usage times can be selected for oil carrying capacity testing and compared with standard values ​​to obtain the corresponding correction coefficient. In actual testing, it is only necessary to multiply the calculated oil carrying capacity by this correction coefficient to obtain the corrected oil carrying capacity as the final test result. Through such correction steps, the accuracy and reliability of the test can be further improved to ensure that the test results can truly reflect the oil carrying situation of the engine.

[0074] For example, select filter samples of different materials (such as paper, metal, etc.) and different usage times (such as brand new, after being used for a period of time); prepare the engine oil, test equipment (such as flow meter, measuring cup, etc.) and recording tools (such as notebook, electronic recorder, etc.) required for the experiment; determine the temperature, pressure and other environmental parameters of the experiment to ensure that all tests are carried out under the same conditions; set the engine oil flow and test time to accurately measure the adsorption of the filter element; conduct a separate test on each filter element sample, record the flow difference before and after the oil passes through the filter element, and calculate the adsorption of the filter element; ensure that the test conditions of each filter element are consistent to obtain comparable data; for a brand new filter element, its initial engine oil adsorption can be tested as a standard value or initial value, and if there is an industry standard or data provided by the manufacturer, it can also be used as a reference standard value; compare the test results of each filter element with the standard value or initial value to calculate the relative adsorption ratio. For example, if the engine oil adsorption of a filter element is 80% of the standard value, the relative adsorption ratio is 0.8. The correction factor is set according to the relative adsorption ratio. The correction factor is the relative adsorption ratio, which is used to correct the adsorption capacity of the filter element in actual use. For example, if the relative adsorption ratio is 0.8, the correction factor is also set to 0.8. Through the above steps, the oil adsorption of filter elements of different materials and different usage times under the same conditions can be experimentally tested, and the corresponding correction factor can be calculated based on the test results, which helps to more accurately evaluate the performance and service life of the filter element and provide strong support for engine maintenance.

[0075] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0076] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0077] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A testing device for testing the amount of engine oil carried, characterized in that: It includes: A first pipeline (1), one end of which is used to communicate with an output end of an engine (7); A three-way control valve (2), the main port of the three-way control valve (2) being connected to the other end of the first pipeline (1); a second pipeline (3), one end of which is in communication with the first branch pipe port of the three-way control valve (2), and the other end of which is in communication with the supercharger (8), and the second pipeline (3) is provided with a separator (4); A third pipeline (5), one end of which is connected to the second branch pipe port of the three-way control valve (2), and the other end of which is used to connect between the separator (4) and the supercharger (8).

2. The testing device for testing the amount of engine oil carried as claimed in claim 1, characterized in that: The testing device for testing the amount of engine oil carried also includes: A pressure gauge (6) is used to monitor the pressure value of the crankcase ventilation system of the engine (7).

3. A method for testing the engine oil carrying capacity of the testing device according to any one of claims 1 to 2, characterized in that: It includes: If the monitoring engine (7) reaches the test condition, the engine (7) is started to test the working condition, the main port of the three-way control valve (2) is controlled to be connected with the first branch port, and timing is started; If the test working condition of the monitoring engine (7) is finished, the main pipe port of the three-way control valve (2) is controlled to be connected with the second branch pipe port, and the timing is ended; The amount of oil carried over is calculated based on the timing duration and the weight difference of the filter element of the separator (4) before and after the test.

4. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 3, characterized in that: Before the monitoring engine (7) reaches the test condition, starts the engine (7) to test the working condition, controls the main port of the three-way control valve (2) to communicate with the first branch port, and starts timing, the method further comprises: The main pipe port of the three-way control valve (2) is controlled to communicate with the second branch pipe port, and the heat engine of the engine (7) is controlled.

5. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 3, characterized in that: After calculating the oil carrying amount based on the timing duration and the weight difference of the filter element before and after the test of the separator (4), the method further includes: Repeating the steps for multiple times, if the monitored engine (7) reaches the test condition, the engine (7) test condition is started, the main pipe port of the three-way control valve (2) is controlled to be connected to the first branch pipe port, and timing is started; if the monitored engine (7) test condition ends, the main pipe port of the three-way control valve (2) is controlled to be connected to the second branch pipe port, and timing is ended; based on the timing duration and the weight difference of the filter element of the separator (4) before and after the test, the amount of oil carried is calculated; Based on the multiple calculations of the oil carryover amount, an average value of the oil carryover amount is obtained as the final oil carryover amount.

6. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 3, characterized in that: If the monitoring engine (7) reaches the test condition, the engine (7) is started to test the working condition, the main port of the three-way control valve (2) is controlled to be connected with the first branch port, and timing is started, including: If the monitoring engine (7) reaches the test condition, the engine (7) is started to test the working condition, the main port of the three-way control valve (2) is controlled to be connected with the first branch port, and timing is started; The operating parameters of the engine (7) are monitored in real time to ensure that the engine (7) maintains stable operation during the test. If the operating parameters of the engine (7) are detected to be abnormal, the test is stopped immediately.

7. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 6, characterized in that: The real-time monitoring of the operating parameters of the engine (7) to ensure that the engine (7) maintains stable operation during the test, and if the operating parameters of the engine (7) are detected to be abnormal, the test is immediately stopped, including: The value of the pressure gauge (6) when the engine (7) is running is monitored in real time. If the value of the pressure gauge (6) exceeds the set pressure value, the test is stopped immediately.

8. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 3, characterized in that: Before the monitoring engine (7) reaches the test condition, starts the engine (7) to test the working condition, controls the main port of the three-way control valve (2) to communicate with the first branch port, and starts timing, the method further comprises: The separator (4) is controlled to perform a preheating treatment to ensure that the separator (4) is in an optimal working state during the test.

9. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 3, characterized in that: After calculating the oil carrying amount based on the timing duration and the weight difference of the filter element before and after the test of the separator (4), the method further includes: The separator (4), the three-way control valve (2), the first pipeline (1), the second pipeline (3) and the third pipeline (5) are cleaned with a cleaning agent to ensure cleanliness and accuracy during the next test.

10. The testing method of the testing device for testing the amount of engine oil carried as claimed in claim 3, characterized in that: The oil carrying amount is calculated based on the timing duration and the weight difference of the filter element before and after the test of the separator (4), including: Based on the material and usage time of the filter element of the separator (4), a filter element adsorption correction coefficient is set, and the calculated oil carrying amount is corrected to obtain the final oil carrying amount.

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