Engine exhaust back pressure testing device

Abstract

The invention discloses an engine exhaust back pressure testing device which comprises an air inlet supply unit used for providing air inlet flow meeting the requirements of different testing working conditions; the flow measuring unit is used for monitoring the air inlet flow in real time and transmitting the data of the air inlet flow to the data processing module; the fuel gas supply and combustion unit is used for controlling fuel gas supply and inlet gas mixed combustion and realizing target exhaust gas flow simulation by adjusting fuel gas and inlet gas flow superposition; the temperature control and monitoring unit is used for monitoring the exhaust temperature in real time and combining with automatic adjustment of a cooling device to enable the exhaust temperature to meet simulation requirements; the back pressure measuring module unit is used for collecting back pressure data of an exhaust outlet in real time and transmitting the back pressure data to the data processing module for contrastive analysis; and the data processing and control unit is used for processing data and realizing test parameter adjustment. The device has the advantages of high simulation of real working conditions, high test accuracy, high automation degree, simple and efficient operation, noise reduction and test environment guarantee.

Description

Technical Field

[0001] The present invention relates to the field of testing technologies, and more particularly, to an engine exhaust back pressure testing device. Background Art

[0002] In fields such as automobiles, ships, and power generation equipment, the engine serves as the core power source, and its performance directly affects the overall efficiency of the equipment. As a key indicator of engine performance, exhaust back pressure has an important impact on the engine's power output, fuel economy, and emission characteristics. Excessive exhaust back pressure will lead to insufficient intake air volume in the engine, incomplete combustion, reduced engine power, increased fuel consumption, and deteriorated emissions. On the contrary, too low exhaust back pressure, although beneficial to the exhaust of waste gas, may affect the scavenging effect and combustion stability of the engine. Therefore, accurately measuring and effectively controlling the engine exhaust back pressure is crucial for optimizing engine performance and improving energy utilization efficiency. The traditional engine exhaust back pressure testing methods have the following problems: In the early stage, some tests relied on manual operation and simple instrument measurement. This method was not only inefficient but also prone to introducing human errors during data collection and processing, resulting in poor accuracy and reliability of test results. With the continuous development of engine technology, its structure and working process have become increasingly complex. Traditional testing methods are difficult to simulate the actual exhaust conditions of the engine under various complex working conditions, and cannot comprehensively obtain the exhaust back pressure data under different working conditions, which limits the in-depth study of engine performance. Some simple testing devices can only measure the exhaust back pressure under specific working conditions, and cannot achieve the coordinated control and precise adjustment of multiple parameters such as intake air flow, gas flow, and exhaust temperature, making it difficult to simulate the dynamic change process during the actual operation of the engine. In addition, due to the lack of effective data processing and analysis capabilities, these devices cannot fully explore the information behind the test data and cannot provide strong support for the optimized design and fault diagnosis of the engine.

[0003] Therefore, those skilled in the art are committed to providing an engine exhaust back pressure testing device that can simulate various working conditions of the engine, achieve precise control and real-time monitoring of multiple parameters, and has strong data processing and analysis capabilities. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an engine exhaust back pressure testing device that can effectively solve the above-mentioned technical problems.

[0005] To achieve the above object, the present invention provides an engine exhaust back pressure testing device, including An intake supply unit for providing an intake air flow that meets the requirements of different test working conditions; A flow measurement unit for real-time monitoring of the intake air flow and transmitting the data of the intake air flow to the data processing module; A gas supply and combustion unit: for controlling the gas supply and the mixing and combustion of the intake air, and realizing the simulation of the target exhaust gas flow by adjusting the superposition of the gas and intake air flows; A temperature control and monitoring unit: for real-time monitoring of the exhaust gas temperature and automatically adjusting in combination with a cooling device to make the exhaust gas temperature meet the simulation requirements; A back pressure measurement module unit: for real-time collecting the back pressure data at the exhaust gas outlet and transmitting it to the data processing module for comparative analysis; A data processing and control unit: for processing data and realizing the adjustment of test parameters.

[0006] Furthermore, the intake air supply unit includes A fan for providing the intake air flow; An intake air flow regulation unit for regulating the magnitude of the intake air flow of the fan and controlling the operating parameters of the fan.

[0007] Furthermore, the flow measurement unit includes at least two air flow meters, each of the air flow meters being installed on the intake air pipeline at the output end of the fan for real-time monitoring of the intake air flow conveyed by the fan and transmitting the data to the data processing module.

[0008] Furthermore, the gas supply and combustion unit includes a gas supply pipeline, a combustion chamber and an ignition rod. The gas enters the combustion chamber through the gas supply pipeline, mixes and burns with the air provided by the fan. By controlling the supply flow of the gas and the intake air flow and using the addition of the two to reach the target exhaust gas flow value, a gas flow meter is provided on the gas supply pipeline; It also includes a control device for controlling the combustion chamber. By adjusting the combustion process through the control device, the stability and sufficiency of combustion are ensured to simulate the real combustion working condition of the engine, and the combustion rate of the combustion chamber > 99%; The ignition rod, which is used to provide an initial fire source for the mixed gas of the gas and air, ignite the mixed gas and realize combustion.

[0009] Furthermore, the temperature control and monitoring unit includes A number of temperature sensors, each of the temperature sensors being arranged on the exhaust gas passage after combustion for real-time monitoring of the exhaust gas temperature; A cooling device. When the exhaust gas temperature exceeds the set range, the cooling device is automatically started to cool the exhaust gas so that the exhaust gas temperature reaches the target temperature consistent with the exhaust gas temperature of the real engine. The operation of the cooling device is controlled through the temperature data fed back by the temperature sensors to realize the adjustment of the exhaust gas temperature.

[0010] Further, the backpressure measurement module unit includes a backpressure sensor, which is arranged at the exhaust outlet and used to measure the exhaust backpressure. The exhaust backpressure data is monitored in real time through the backpressure sensor and transmitted to the data processing module for comparison and analysis with the exhaust backpressure data of the real engine.

[0011] Further, the data processing and control unit adopts automatic control and is built-in with an AI algorithm. It is used to receive data from the flow measurement unit, the temperature control and monitoring unit, and the backpressure measurement module unit. According to the preset engine exhaust flow rate, temperature, and backpressure parameters, it automatically calculates and adjusts the intake air flow rate, gas flow rate, and the operating state of the cooling device, realizes the full-automatic control of the test device, and ensures that the exhaust flow rate, temperature, and backpressure simulated by the test device are consistent with the corresponding parameters of the real engine.

[0012] Further, the specific implementation of the automatic control adopted by the data processing and control unit is as follows: The air flow meter of the flow measurement unit collects the intake air flow rate data in real time, the temperature sensor of the temperature control and monitoring unit collects the exhaust temperature data, and the backpressure sensor of the backpressure measurement module unit obtains the exhaust backpressure data. The collected data is first preprocessed, and the preprocessing includes removing outliers and filling in missing values; The built-in AI algorithm model is trained through historical test data and real engine operation data, including the intake air flow rate, gas flow rate, exhaust flow rate, temperature, and backpressure parameters under different working conditions. During the training process, the parameters of the AI model are continuously adjusted to enable it to accurately capture the complex relationships between various parameters and improve the accuracy of model prediction and control; The AI algorithm receives the preprocessed data, combines the preset engine exhaust flow rate, temperature, and backpressure parameters, and conducts real-time analysis. It mines the data features through deep learning algorithms, predicts the change trends of various parameters under the current test state, and automatically calculates the adjustment strategies for the intake air flow rate, gas flow rate, and the operating state of the cooling device according to the analysis and prediction results to ensure that the exhaust flow rate, temperature, and backpressure simulated by the test device are consistent with the corresponding parameters of the real engine; The data processing and control unit sends control instructions to the intake air supply unit, the gas supply and combustion unit, and the cooling device according to the adjustment strategies generated by the AI algorithm. The fan speed and the intake air flow rate adjustment unit of the intake air supply unit act to accurately adjust the intake air flow rate; the gas supply and combustion unit controls the valve opening of the gas supply pipeline to adjust the gas flow rate; the cooling device starts, stops, or adjusts the cooling power according to the instructions; During the test, continuously monitor the changes in various parameters, and feed the actually adjusted parameters back to the AI algorithm again. The AI algorithm compares the difference between the actual parameters and the target parameters, and dynamically optimizes the control strategy. If it is found that the current control strategy has poor effect, the AI algorithm recalculates the adjustment plan.

[0013] Furthermore, it also includes a data storage and analysis unit, which is connected to the data processing and control unit of the test device, and is used to store data such as intake air flow, gas flow, exhaust gas flow, temperature, and back pressure collected during the test, and conduct in-depth analysis on these data to generate a test report. The human-machine interaction interface is provided with a display screen and operation buttons, and is used to input test parameters through the human-machine interaction interface, view real-time test data and test results, and monitor and manage the test process.

[0014] Furthermore, it also includes a muffler, which is used to reduce the noise generated during the mixing and combustion of gas and air in the combustion chamber.

[0015] The beneficial effects of the present invention are: 1. Highly simulate the real working conditions, with high test accuracy. Through the gas supply and combustion unit, accurately control the superposition of gas and intake air flow, simulate the target exhaust gas flow, and the combustion rate of the combustion chamber > 99%. It can highly restore the real combustion working conditions of the engine. The temperature control and monitoring unit combines with the cooling device to adjust the exhaust gas temperature to be consistent with the real engine in real time. The back pressure measurement module unit accurately collects the exhaust gas back pressure data. Each unit works together to ensure that the parameters such as exhaust gas flow, temperature, and back pressure simulated by the test device are highly consistent with the real engine, greatly improving the accuracy of the test results and providing reliable data for the research of engine performance. 2. High degree of automation, simple and efficient operation. The data processing and control unit is built-in with an AI algorithm and adopts automatic control. It can automatically receive the data from the flow measurement unit, temperature control and monitoring unit, and back pressure measurement module unit, and automatically calculate and adjust the intake air flow, gas flow, and operating state of the cooling device according to the preset parameters. The whole test process does not require frequent manual intervention, which not only reduces the manual operation error but also improves the test efficiency. The operator only needs to input test parameters, view data, and monitor and manage the test process through the human-machine interaction interface, and the operation is simple and fast. 3. The data storage and analysis unit stores various data during the test process and conducts in-depth analysis to generate a test report. These data provide rich data support for the optimal design of the engine exhaust system. R & D personnel can find out the weak links of the engine exhaust system according to the analysis results of the data, and make targeted improvements and optimizations, so as to improve the overall performance of the engine, reduce the R & D cost, and shorten the R & D cycle.

[0016] 4. Reduce noise and ensure the test environment. The device is equipped with a muffler to effectively reduce the noise generated by the mixed combustion of gas and air in the combustion chamber, creating a relatively quiet working environment for the testers, avoiding damage to the testers' hearing caused by noise, and reducing the interference of noise to the surrounding environment at the same time. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a specific embodiment of the present invention.

[0018] Figure 2 is a structural block diagram of an engine exhaust back pressure test device. Specific Embodiments

[0019] The present invention will be further described below with reference to the drawings and embodiments: In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "setting", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] As Figures 1 to 2 shown, an engine exhaust back pressure test device includes an intake supply unit for providing an intake flow rate that meets the requirements of different test conditions; a flow measurement unit for real-time monitoring of the intake flow rate and transmitting the data of the intake flow rate to the data processing module; a gas supply and combustion unit: for controlling the gas supply and mixing combustion with the intake air, and realizing the simulation of the target exhaust flow rate by adjusting the superposition of the gas and intake air flow rates; a temperature control and monitoring unit: for real-time monitoring of the exhaust temperature and automatically adjusting it in combination with the cooling device to make the exhaust temperature meet the simulation requirements; Backpressure measurement module unit: It is used to collect exhaust outlet backpressure data in real time and transmit it to the data processing module for comparative analysis; Data processing and control unit: It is used to process data and adjust test parameters.

[0022] The intake air supply unit includes Fan 1, which is used to provide intake air flow; Intake air flow regulation unit, which is used to regulate the size of the intake air flow of Fan 1 and control the operating parameters such as the rotation speed of the fan, so as to accurately adjust the intake air flow.

[0023] The flow measurement unit includes at least two high-precision air flow meters 2. Each air flow meter 2 is installed on the intake air pipeline 3 at the output end of Fan 1, and is used to monitor the intake air flow conveyed by Fan 1 in real time and transmit the data to the data processing module.

[0024] The fuel gas supply and combustion unit includes a fuel gas supply pipeline 5, a combustion chamber 6 and an ignition rod 8. The fuel gas enters the combustion chamber 6 through the fuel gas supply pipeline 5, mixes and burns with the air provided by Fan 1. By controlling the supply flow of the fuel gas and the intake air flow, the target exhaust gas flow value is achieved by adding the two. A fuel gas flow meter 7 is provided on the fuel gas supply pipeline 5; It also includes a control device for controlling the combustion chamber 6. The combustion process is adjusted through the control device to ensure the stability and sufficiency of combustion, so as to simulate the real combustion working condition of the engine. The combustion rate of the combustion chamber 6 > 99%; The ignition rod 8. The ignition rod 8 is used to provide an initial fire source for the mixed gas of fuel gas and air, ignite the mixed gas and achieve combustion. During the simulation of the engine exhaust backpressure test, only when the fuel gas and air are fully mixed and ignited can the real combustion working condition of the engine be simulated, and then exhaust gas flow, temperature, backpressure and other parameters that meet the test requirements can be generated, ensuring that the test device accurately simulates the engine exhaust situation and realizing the effective test of the engine exhaust backpressure.

[0025] The temperature control and monitoring unit includes Several temperature sensors. Each temperature sensor is arranged on the exhaust gas passage after combustion and is used to monitor the exhaust gas temperature in real time; Cooling device. When the exhaust gas temperature exceeds the set range, the cooling device is automatically started to cool the exhaust gas, so that the exhaust gas temperature reaches the target temperature consistent with the real engine exhaust gas temperature. The operation of the cooling device is controlled through the temperature data fed back by the temperature sensor to realize the adjustment of the exhaust gas temperature.

[0026] The backpressure measurement module unit includes a backpressure sensor, which is arranged at the exhaust outlet for measuring the exhaust backpressure. The exhaust backpressure data is monitored in real time by the backpressure sensor and transmitted to the data processing module for comparison and analysis with the exhaust backpressure data of a real engine.

[0027] The data processing and control unit adopts automatic control and has a built-in AI algorithm. It is used to receive data from the flow measurement unit, the temperature control and monitoring unit, and the backpressure measurement module unit. According to the preset engine exhaust flow rate, temperature, and backpressure parameters, it automatically calculates and adjusts the intake air flow rate, gas flow rate, and the operating state of the cooling device, realizing full-automatic control of the test device and ensuring that the simulated exhaust flow rate, temperature, and backpressure of the test device are consistent with the corresponding parameters of a real engine.

[0028] The specific implementation of the automatic control adopted by the data processing and control unit is as follows: The air flow meter of the flow measurement unit collects the intake air flow rate data in real time, the temperature sensor of the temperature control and monitoring unit collects the exhaust temperature data, and the backpressure sensor of the backpressure measurement module unit obtains the exhaust backpressure data. The collected data is first preprocessed, and the preprocessing includes removing outliers and filling in missing values. Based on historical test data and real engine operation data, the built-in AI algorithm model is trained, including the intake air flow rate, gas flow rate, exhaust flow rate, temperature, and backpressure parameters under different working conditions. During the training process, the parameters of the AI model are continuously adjusted to enable it to accurately capture the complex relationships between various parameters and improve the accuracy of model prediction and control. The AI algorithm receives the preprocessed data, combines the preset engine exhaust flow rate, temperature, and backpressure parameters, and conducts real-time analysis. It mines data features through deep learning algorithms, predicts the change trends of various parameters under the current test state, and automatically calculates the adjustment strategies for the intake air flow rate, gas flow rate, and the operating state of the cooling device according to the analysis and prediction results, ensuring that the simulated exhaust flow rate, temperature, and backpressure of the test device are consistent with the corresponding parameters of a real engine. The data processing and control unit sends control instructions to the intake air supply unit, the gas supply and combustion unit, and the cooling device according to the adjustment strategies generated by the AI algorithm. The fan speed and the intake air flow rate adjustment unit of the intake air supply unit act to accurately adjust the intake air flow rate; the gas supply and combustion unit controls the valve opening of the gas supply pipeline 5 to adjust the gas flow rate; the cooling device starts, stops, or adjusts the cooling power according to the instructions, realizing precise control of the exhaust temperature, and the whole process is fully automated.

[0029] During the testing process, continuously monitor the changes in various parameters, and feedback the actually adjusted parameters to the AI algorithm again. The AI algorithm compares the differences between the actual parameters and the target parameters, and dynamically optimizes the control strategy. If it is found that the current control strategy has poor effects, the AI algorithm recalculates the adjustment plan. Further improve the accuracy and stability of the testing, so that the testing device can better adapt to different testing conditions and environmental changes.

[0030] It also includes a data storage and analysis unit, which is connected to the data processing and control unit of the testing device, and is used to store data such as intake air flow, fuel gas flow, exhaust gas flow, temperature, and back pressure collected during the testing process, and deeply analyze these data to generate a test report, providing data support for the optimized design of the engine exhaust system.

[0031] a human-machine interaction interface, which is provided with a display screen and operation buttons, and is used to input test parameters through the human-machine interaction interface, view real-time test data and test results, and monitor and manage the testing process.

[0032] It also includes a muffler 10, which is used to reduce the noise generated during the mixing and combustion of fuel gas and air in the combustion chamber 6.

[0033] This engine exhaust back pressure testing device works through the coordinated operation of multiple units to simulate the engine exhaust process and conduct parameter testing and control. Its working principle is as follows: Intake and flow measurement: The fan in the intake air supply unit provides the intake air flow. The intake air flow regulation unit precisely controls operating parameters such as the fan speed to adjust the intake air volume. At least two high-precision air flow meters in the flow measurement unit continuously monitor the intake air flow output by the fan and transmit the data to the data processing module, providing basic data for subsequent calculations and controls; Fuel gas supply and combustion: The fuel gas enters the combustion chamber through the fuel gas supply pipeline and mixes with the air sent by the fan. The fuel gas flow meter on the fuel gas supply pipeline monitors the fuel gas flow. By adjusting the superposition of the fuel gas and intake air flows to reach the target exhaust gas flow value, the ignition rod provides an initial ignition source for the mixed gas, and the control device ensures stable and sufficient combustion with a combustion rate greater than 99%, simulating the real combustion conditions of the engine; Temperature control: Multiple temperature sensors in the temperature control and monitoring unit continuously monitor the temperature of the exhaust gas passage after combustion. When the exhaust gas temperature exceeds the set range, the cooling device automatically starts and adjusts the cooling power according to the feedback data of the temperature sensors to make the exhaust gas temperature consistent with the real engine exhaust gas temperature; Backpressure measurement and data processing: The backpressure sensor of the backpressure measurement module unit collects backpressure data at the exhaust outlet and transmits it to the data processing module. The data processing and control unit has a built-in AI algorithm. It receives data such as intake air flow, exhaust temperature, and backpressure. After preprocessing and model training, it analyzes and predicts the changing trends of various parameters in real time, automatically calculates and adjusts the intake air flow, gas flow, and the operating state of the cooling device to ensure that the simulated parameters are consistent with the real engine. During the test, the parameters are continuously monitored, and the control strategy is dynamically optimized according to the difference between the actual and target parameters; Data storage and interaction: The data storage and analysis unit stores the test data and deeply analyzes it to generate a report, providing data support for the human-machine interaction interface. The operator inputs test parameters, views real-time data and results through the human-machine interaction interface, and monitors and manages the test process. The muffler reduces the noise generated by combustion and ensures the stability of the test environment.

[0034] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. An engine exhaust back pressure test device, characterized in that, including an intake air supply unit for providing an intake air flow rate that meets the requirements of different test conditions; a flow rate measurement unit for real-time monitoring of the intake air flow rate and transmitting the intake air flow rate data to a data processing module; a fuel gas supply and combustion unit: for controlling the fuel gas supply and intake air mixing combustion, and realizing the simulation of the target exhaust gas flow rate by adjusting the superposition of the fuel gas and intake air flow rates; a temperature control and monitoring unit: for real-time monitoring of the exhaust gas temperature and automatically adjusting in combination with a cooling device to make the exhaust gas temperature meet the simulation requirements; a back pressure measurement module unit: for real-time collecting the exhaust gas outlet back pressure data and transmitting it to the data processing module for comparative analysis; a data processing and control unit: for processing data and realizing the adjustment of test parameters.

2. The engine exhaust back pressure testing device according to claim 1, characterized in that, The intake air supply unit includes a fan (1) for providing an intake air flow rate; an intake air flow rate adjustment unit for adjusting the magnitude of the intake air flow rate of the fan (1) and controlling the operating parameters of the fan.

3. The engine exhaust backpressure test device according to claim 2, characterized in that, The flow rate measurement unit includes at least two air flow meters (2), and each of the air flow meters (2) is installed on the intake air pipe (3) at the output end of the fan (1) for real-time monitoring of the intake air flow rate conveyed by the fan (1) and transmitting the data to the data processing module.

4. The engine exhaust gas back pressure test device according to claim 3, wherein the fuel gas supply and combustion unit includes a fuel gas supply pipe (5), a combustion chamber (6) and an ignition rod (8), the fuel gas enters the combustion chamber (6) through the fuel gas supply pipe (5), mixes and burns with the air provided by the fan (1), and reaches the target exhaust gas flow rate value by adding the two by controlling the fuel gas supply flow rate and the intake air flow rate, and a fuel gas flow meter (7) is arranged on the fuel gas supply pipe (5); it further includes a control device for controlling the combustion chamber (6), and the combustion process is adjusted through the control device to ensure the stability and sufficiency of combustion so as to simulate the real combustion condition of the engine, and the combustion rate of the combustion chamber (6) > 99%; the ignition rod (8), the ignition rod (8) is used for providing an initial fire source for the fuel gas and air mixture gas to ignite the mixture gas and realize combustion.

5. The engine exhaust back pressure testing device according to claim 4, characterized in that, The temperature control and monitoring unit includes a plurality of temperature sensors, and each of the temperature sensors is arranged on the exhaust gas passage after combustion for real-time monitoring of the exhaust gas temperature; a cooling device, when the exhaust gas temperature exceeds the set range, the cooling device is automatically started to cool the exhaust gas so that the exhaust gas temperature reaches the target temperature consistent with the exhaust gas temperature of the real engine, and the operation of the cooling device is controlled through the temperature data fed back by the temperature sensors to realize the adjustment of the exhaust gas temperature.

6. The engine exhaust back pressure test device according to claim 5, characterized in that, The back pressure measurement module unit includes a back pressure sensor, the back pressure sensor is arranged at the exhaust gas outlet for measuring the exhaust gas back pressure, the exhaust gas back pressure data is real-time monitored through the back pressure sensor and transmitted to the data processing module for comparison and analysis with the exhaust gas back pressure data of the real engine.

7. The engine exhaust backpressure testing device according to claim 6, characterized in that, The data processing and control unit adopts automatic control and is built-in with AI algorithms. It is used to receive data from the flow measurement unit, temperature control and monitoring unit, and back pressure measurement module unit. According to the preset engine exhaust gas flow rate, temperature, and back pressure parameters, it automatically calculates and adjusts the intake air flow rate, gas flow rate, and the operating state of the cooling device, realizing the full-automatic control of the test device and ensuring that the simulated exhaust gas flow rate, temperature, and back pressure of the test device are consistent with the corresponding parameters of the real engine.

8. The engine exhaust backpressure test device according to claim 7, characterized in that, The specific implementation of the automatic control adopted by the data processing and control unit is as follows: The air flow meter of the flow measurement unit collects intake air flow rate data in real time, the temperature sensor of the temperature control and monitoring unit collects exhaust gas temperature data, and the back pressure sensor of the back pressure measurement module unit obtains exhaust gas back pressure data. The collected data is first preprocessed, and the preprocessing includes removing outliers and filling in missing values; The built-in AI algorithm model is trained through historical test data and real engine operation data, including intake air flow rate, gas flow rate, exhaust gas flow rate, temperature, and back pressure parameters under different working conditions. During the training process, the parameters of the AI model are continuously adjusted; The AI algorithm receives the preprocessed data, combines the preset engine exhaust gas flow rate, temperature, and back pressure parameters, and conducts real-time analysis. It mines data features through deep learning algorithms, predicts the change trends of each parameter under the current test state, and automatically calculates the adjustment strategies for the intake air flow rate, gas flow rate, and the operating state of the cooling device according to the analysis and prediction results, ensuring that the simulated exhaust gas flow rate, temperature, and back pressure of the test device are consistent with the corresponding parameters of the real engine; Based on the adjustment strategies generated by the AI algorithm, the data processing and control unit sends control commands to the intake air supply unit, gas supply and combustion unit, and cooling device. The fan speed and intake air flow rate adjustment unit of the intake air supply unit act to accurately adjust the intake air flow rate; the gas supply and combustion unit controls the valve opening of the gas supply pipeline (5) to adjust the gas flow rate; the cooling device starts, stops, or adjusts the cooling power according to the command; During the test process, the changes of each parameter are continuously monitored, and the actually adjusted parameters are fed back to the AI algorithm again. The AI algorithm compares the difference between the actual parameters and the target parameters and dynamically optimizes the control strategy. If it is found that the current control strategy has poor effects, the AI algorithm recalculates the adjustment plan.

9. The engine exhaust back pressure test device according to claim 8, characterized in that, It also includes a data storage and analysis unit, which is connected to the data processing and control unit of the test device and is used to store data such as intake air flow rate, gas flow rate, exhaust gas flow rate, temperature, and back pressure collected during the test, and conduct in-depth analysis on these data to generate a test report; a human-machine interface, which is provided with a display screen and operation buttons and is used to input test parameters through the human-machine interface, view real-time test data and test results, and monitor and manage the test process.

10. The engine exhaust back pressure testing device according to claim 9, characterized in that, It also includes a muffler (10) for reducing the noise generated during the mixing and combustion of gas and air in the combustion chamber (6).

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