Testing system, testing method and testing device for common rail system of diesel engine and storage medium

Abstract

The invention discloses a test system, a test method and a test device for a common rail system of a diesel engine, and a storage medium. The test system comprises a driving module which is electrically connected with an oil supply pump of the diesel engine common rail system and is used for driving the oil supply pump to operate; the detection module is arranged on the diesel engine common rail system and used for detecting working condition parameters of the diesel engine common rail system; and the controller is electrically connected with the driving module and the detection module. The detection module can monitor working condition parameters such as oil pressure, temperature and flow of the common rail system in real time, comprehensiveness and accuracy of the testing process are ensured, the controller receives and processes data transmitted by the detection module, whether the common rail system is in a normal working state or not is judged through analysis, and the driving module is controlled to stop working in time. According to the invention, the technical problem of common rail system fault processing delay in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of autonomous driving, and in particular to a test system, a test method, a test device, and a storage medium for a common rail system of a diesel engine. Background Art

[0002] During long-term reliability testing of diesel engine high-pressure common rail systems, most test systems require manual inspection and operation when a fault occurs. This manual control is not only inefficient, but also easily leads to missed optimal response times in emergencies due to delayed human response, thereby increasing the risk of equipment damage.

[0003] Therefore, in the prior art, how to promptly handle system failures that occur during the testing process of a diesel engine high-pressure common rail system has become a key issue. Summary of the Invention

[0004] Embodiments of the present invention provide a test system, a test method, a test device, and a storage medium for a common rail system of a diesel engine, so as to at least solve the technical problem of common rail system fault processing delay in related technologies.

[0005] According to one aspect of an embodiment of the present invention, a test system for a common rail system of a diesel engine is provided. The test system includes: a drive module, the drive module is electrically connected to a fuel supply pump of the diesel engine common rail system, and the drive module is used to drive the fuel supply pump to operate; a detection module, the detection module is arranged on the diesel engine common rail system, and the detection module is used to detect operating parameters of the diesel engine common rail system; and a controller, the controller is electrically connected to the drive module and the detection module.

[0006] Optionally, the detection module includes multiple detection units, all of which are electrically connected to the controller, each detection unit is controlled independently of each other, and the operating condition parameters detected by each detection unit are set differently.

[0007] Optionally, the multiple detection units include a pressure detection unit, a temperature detection unit, and a flow detection unit. The pressure detection unit is used to detect the oil pressure of the diesel engine common rail system, the temperature detection unit is used to detect the oil temperature of the diesel engine common rail system, and the flow detection unit is used to detect the oil flow of the diesel engine common rail system.

[0008] Optionally, the diesel engine common rail system includes a fuel supply pump, a rail pipe, a fuel injector, a lubricating oil circuit for lubricating the fuel supply pump, a low-pressure oil circuit for supplying oil to the fuel supply pump, a pressure regulating oil circuit for connecting the pressure regulating port of the rail pipe with the fuel tank, an injection oil circuit for connecting the injection port of the fuel injector with the fuel tank, a first return oil circuit for connecting the return oil port of the fuel injector with the fuel tank, and a second return oil circuit for connecting the return oil port of the fuel supply pump with the fuel tank. The pressure detection unit includes: a first pressure sensor, which is arranged on the rail pipe and is used to detect the oil pressure of the rail pipe; and / or, a second pressure sensor, which is arranged on the low-pressure oil circuit; and / or, a third pressure sensor, which is arranged on the oil inlet section of the lubricating oil circuit.

[0009] Optionally, the temperature detection unit includes: a first temperature sensor, which is arranged on the low-pressure oil circuit; and / or, a second temperature sensor, which is arranged on the second return oil circuit; and / or, a third temperature sensor, which is arranged on the first return oil circuit; and / or, a fourth temperature sensor, which is arranged on the oil inlet section of the lubricating oil circuit; and / or, a fifth temperature sensor, which is arranged on the return oil section of the lubricating oil circuit.

[0010] Optionally, the flow detection unit includes: a first flowmeter, the first flowmeter is arranged on the low-pressure oil circuit; and / or, a second flowmeter, the second flowmeter is arranged on the second return oil circuit; and / or, a third flowmeter, the third flowmeter is arranged on the pressure regulating oil circuit; and / or, a fourth flowmeter, the fourth flowmeter is arranged on the injection oil circuit; and / or, a fifth flowmeter, the fifth flowmeter is arranged on the first return oil circuit; and / or, a sixth flowmeter, the sixth flowmeter is arranged on the oil inlet section of the lubricating oil circuit; and / or, a seventh flowmeter, the seventh flowmeter is arranged on the return oil section of the lubricating oil circuit.

[0011] According to another aspect of an embodiment of the present invention, a method for testing a common rail system of a diesel engine is provided. The method is performed based on the above-mentioned test system of the common rail system of the diesel engine, and the method includes the following steps: in response to the completion of connection of the test system of the common rail system of the diesel engine, controlling the drive module to enter an operating mode to enable the fuel supply pump to operate; obtaining operating parameters of the common rail system of the diesel engine; determining whether the common rail system of the diesel engine is operating abnormally based on the operating parameters; and if it is determined that the common rail system of the diesel engine is operating abnormally, controlling the drive module to stop operating to enable the fuel supply pump to stop operating.

[0012] Optionally, there are multiple operating condition parameters, and the method further includes: determining whether each operating condition parameter exceeds a corresponding parameter threshold range; when it is determined that a preset number of operating condition parameters all exceed the corresponding parameter threshold range, determining that the diesel engine common rail system is operating abnormally.

[0013] According to another aspect of an embodiment of the present invention, a test device for a common rail system of a diesel engine is further provided, comprising: a first control module, the first control module being configured to control a drive module to enter an operating mode in response to completion of connection of a test system of the common rail system of the diesel engine, so as to operate a fuel supply pump; an acquisition module, the acquisition module being configured to obtain operating parameters of the common rail system of the diesel engine; a determination module, the determination module being configured to determine whether the common rail system of the diesel engine is operating abnormally based on the operating parameters; and a second control module, the second control module being configured to control the drive module to stop operating, so as to stop the fuel supply pump, if it is determined that the common rail system of the diesel engine is operating abnormally.

[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program. When the program is run, the computer-readable storage medium is controlled so that the device performs the above-mentioned diesel engine common rail system testing method.

[0015] In an embodiment of the present invention, the drive module can drive the fuel supply pump to simulate the operating status of the diesel engine common rail system in an actual working environment. The detection module can monitor the operating parameters of the common rail system, such as oil pressure, temperature and flow, in real time to ensure the comprehensiveness and accuracy of the test process. The controller, as the core, not only controls the start and stop of the drive module, but also receives and processes the data transmitted by the detection module. By analyzing and judging whether the common rail system is in a normal working state, it controls the drive module to stop working in time, thereby solving the technical problem of delayed fault handling of the common rail system in related technologies, avoiding test errors caused by untimely manual monitoring and incomplete data recording in traditional testing methods, realizing an automated testing process for the common rail system, and significantly improving test efficiency and reliability of results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 2 is a schematic structural diagram of a test system for a common rail system of a diesel engine according to one embodiment of the present invention;

[0018] Figure 2 is a logic diagram of a test system for a diesel engine common rail system according to one embodiment of the present invention;

[0019] Figure 3 is a hardware structure block diagram of a computer terminal according to one embodiment of the present invention;

[0020] Figure 4 is a flow chart of a method for testing a common rail system of a diesel engine according to one embodiment of the present invention;

[0021] Figure 5 1 is a structural block diagram of a test device for a common rail system of a diesel engine according to one embodiment of the present invention.

[0022] The above drawings include the following reference numerals:

[0023] 11. Drive module; 12. Fuel supply pump; 13. Controller; 14. Fuel tank; 15. Rail pipe; 16. First injector; 17. Second injector;

[0024] 18. First pressure sensor; 19. Pressure regulating valve;

[0025] 20. First temperature sensor; 21. Second pressure sensor; 22. First flow meter;

[0026] 23. First oil pump;

[0027] 24. Second flow meter; 25. Second temperature sensor;

[0028] 26. Third flow meter; 27. Fourth flow meter; 28. Fifth flow meter;

[0029] 29. Third temperature sensor; 30. Fourth temperature sensor;

[0030] 31. Third pressure sensor; 32. Sixth flow meter;

[0031] 33. Fifth temperature sensor; 34. Seventh flow meter;

[0032] 35. Lubricating oil tank; 36. Second oil pump;

[0033] 37. Acquisition signal; 38. First control circuit; 39. Second control circuit; 40. Logic decision unit. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] According to one aspect of the embodiment of the present invention, Figure 1 and Figure 2 As shown, a test system for a diesel engine common rail system is provided.

[0037] Specifically, the test system includes a drive module 11, a detection module and a controller 13. The drive module 11 is electrically connected to the fuel supply pump 12 of the diesel engine common rail system, and the drive module 11 is used to drive the fuel supply pump 12 to operate; the detection module is set on the diesel engine common rail system, and the detection module is used to detect the operating parameters of the diesel engine common rail system; the controller 13 is electrically connected to the drive module 11 and the detection module.

[0038] By applying the technical solution of this embodiment, the drive module 11 can drive the fuel supply pump 12 to work, simulating the operating state of the diesel engine common rail system in an actual working environment. The detection module can monitor the operating parameters of the common rail system, such as oil pressure, temperature, and flow, in real time to ensure the comprehensiveness and accuracy of the test process. The controller 13, as the core, not only controls the start and stop of the drive module 11, but also receives and processes data from the detection module. By analyzing and judging whether the common rail system is in a normal working state, it controls the drive module 11 to stop working in time, thereby solving the technical problem of delayed fault handling of the common rail system in related technologies, avoiding test errors caused by untimely manual monitoring and incomplete data recording in traditional testing methods, realizing an automated testing process for the common rail system, and significantly improving test efficiency and reliability of results.

[0039] Optionally, the detection module includes a plurality of detection units, all of which are electrically connected to the controller 13 , each detection unit is controlled independently of each other, and the operating condition parameters detected by each detection unit are set differently.

[0040] By configuring multiple independently controlled detection units, the test system of this embodiment can simultaneously monitor multiple key points of a diesel engine's common rail system, such as the rail pipe, injectors, and lubrication oil circuits. Each detection unit focuses on a specific operating parameter, such as pressure, temperature, or flow rate. This ensures comprehensive and in-depth testing, enabling earlier detection of potential faults and avoiding the potential omission of important information when monitoring a single parameter. The independent connection between each detection unit and the controller ensures more stable and reliable data transmission. Even if a unit fails, it will not affect data collection and transmission from other units, thus ensuring the stable operation of the entire test system.

[0041] Optionally, the multiple detection units include a pressure detection unit, a temperature detection unit, and a flow detection unit. The pressure detection unit is used to detect the oil pressure of the diesel engine common rail system, the temperature detection unit is used to detect the oil temperature of the diesel engine common rail system, and the flow detection unit is used to detect the oil flow of the diesel engine common rail system.

[0042] This embodiment ensures accurate monitoring of the core parameters of the diesel engine common rail system by finely dividing the functions of the detection units. The pressure detection unit can provide real-time feedback on the pressure changes of the oil in the system, which is helpful for judging the working efficiency of the fuel pump and the response speed of the injector; the temperature detection unit detects the temperature of the oil. Too high or too low a temperature may affect the performance and life of the engine; the flow detection unit monitors the flow of the oil and is an important basis for evaluating the system's fuel supply capacity and stability. The coordinated work of these units can not only capture any abnormal situation in real time, but also predict possible problems in the future through data analysis, providing a scientific basis for maintenance and optimization. In the testing of the diesel engine common rail system, the application of this design includes but is not limited to performance evaluation under engine cold start conditions, durability testing under high temperature and high load, and research on the adaptability of different oil products, covering all links from research and development to application.

[0043] Specifically, the diesel engine common rail system includes a fuel supply pump 12, a rail pipe 15, a fuel injector, a lubricating oil circuit for lubricating the fuel supply pump 12, a low-pressure oil circuit for supplying fuel to the fuel supply pump 12, a pressure regulating oil circuit for connecting the pressure regulating port of the rail pipe 15 with the fuel tank 14, an injection oil circuit for connecting the injection port of the fuel injector with the fuel tank 14, a first return oil circuit for connecting the return oil port of the fuel injector with the fuel tank 14, and a second return oil circuit for connecting the return oil port of the fuel supply pump 12 with the fuel tank 14.

[0044] Optionally, the pressure detection unit includes a first pressure sensor 18, which is disposed on the rail tube 15 and is used to detect the oil pressure in the rail tube 15. Located on the rail tube, the first pressure sensor 18 directly reflects the pressure inside the rail tube 15 and can be used to determine the operating status of the injector.

[0045] Optionally, the pressure detection unit includes a second pressure sensor 21 , which is disposed in the low-pressure oil circuit and can monitor the initial oil pressure to help analyze the boosting efficiency of the oil supply pump 12 .

[0046] Optionally, the pressure detection unit includes a third pressure sensor 31, which is provided on the oil inlet section of the lubricating oil circuit to monitor the lubrication condition of the oil supply pump 12 and ensure its long-term stable operation.

[0047] In the above-described embodiment, by deploying pressure sensors at key locations, comprehensive monitoring of the oil pressure distribution is possible, facilitating the evaluation of the system's pressure regulation capabilities and the performance of the fuel supply pump 12. The layout and data acquisition of these sensors not only address the limitations of traditional pressure monitoring testing but also enable, through comparative analysis, a deeper understanding of the system's internal dynamics, facilitating fault prevention and design optimization. In the context of diesel engine common rail system testing, the application of the test system in this embodiment includes, but is not limited to, pressure response testing under varying load conditions, pressure stability assessment under extreme temperatures, and analysis of pressure fluctuations after long-term operation, encompassing key aspects of system performance testing.

[0048] Optionally, the temperature detection unit includes a first temperature sensor 20 , which is disposed in the low-pressure oil circuit. The first temperature sensor 20 is located in the low-pressure oil circuit and monitors the inlet temperature of the oil, which helps to understand the effect of the oil temperature on the oil supply pump 12 .

[0049] Optionally, the temperature detection unit includes a second temperature sensor 25, which is disposed on the second oil return line. The second temperature sensor 25 is disposed on the second oil return line to reflect the return oil temperature of the injector, which can be used to determine the cooling efficiency of the injector.

[0050] Optionally, the temperature detection unit includes a third temperature sensor 29 , which is disposed on the first oil return line. The third temperature sensor 29 is installed on the first oil return line to monitor the return oil temperature of the rail pipe 15 , which helps analyze the thermal balance state of the rail pipe 15 .

[0051] Optionally, the temperature detection unit includes a fourth temperature sensor 30, which is disposed at the oil inlet section of the lubricating oil circuit. The fourth temperature sensor 30 is located at the oil inlet section of the lubricating oil circuit to monitor the lubrication and cooling conditions of the oil supply pump 12, ensuring that it maintains optimal operating conditions under various operating conditions.

[0052] Optionally, the temperature detection unit includes a fifth temperature sensor 33, which is located in the oil return section of the lubricating oil circuit. This fifth temperature sensor 33 monitors the lubrication and cooling conditions of the oil supply pump 12, ensuring optimal operation under various operating conditions.

[0053] In the above-mentioned embodiment, temperature is one of the key factors affecting the performance of the diesel engine common rail system. By deploying temperature sensors at key locations in the common rail system, it is possible to monitor the temperature changes of the oil and lubricating oil in real time, which is beneficial for evaluating the system's thermal management capabilities and preventing overheating failures. The rational configuration of temperature sensors not only solves the shortcomings of temperature monitoring in traditional tests, but also can provide early warning of possible overheating risks through data analysis, which plays an important role in improving the safety of the system and extending its service life. In the testing of the diesel engine common rail system, the application of the test system in this embodiment includes but is not limited to temperature adaptability testing in different seasons and ambient temperatures, temperature stability evaluation after long-term continuous operation, and research on the impact of different oil products on system temperature, comprehensively covering the testing needs of system thermal management.

[0054] Optionally, the flow detection unit includes a first flow meter 22 , which is disposed in the low-pressure oil circuit. The first flow meter 22 is located in the low-pressure oil circuit and monitors the initial flow rate of the oil, which can be used to evaluate the oil suction capacity of the oil supply pump 12 .

[0055] Optionally, the flow detection unit includes a second flow meter 24, which is provided on the second oil return line. The second flow meter 24 is placed on the second oil return line to reflect the amount of oil returned from the injector, which helps analyze the working efficiency and cooling effect of the injector.

[0056] Optionally, the flow detection unit includes a third flow meter 26, which is provided on the pressure regulating oil line. The third flow meter 26 is installed on the pressure regulating oil line to monitor the oil flow between the rail pipe 15 and the fuel tank 14, and can be used to evaluate the pressure regulation capability of the common rail system.

[0057] Optionally, the flow detection unit includes a fourth flow meter 27, which is provided on the injection oil line. The fourth flow meter 27 is located on the injection oil line and directly reflects the injection amount of the injector, which is the key to judging the injection accuracy and engine performance.

[0058] Optionally, the flow detection unit includes a fifth flow meter 28 , which is disposed on the first oil return line. The fifth flow meter 28 monitors the return oil flow of the rail pipe 15 , which helps analyze the balance between oil supply and return of the rail pipe 15 .

[0059] Optionally, the flow detection unit includes a sixth flow meter 32, which is provided at the oil inlet section of the lubricating oil circuit. The sixth flow meter 32 is located at the oil inlet section of the lubricating oil circuit and monitors the lubricating oil flow of the oil supply pump 12 to ensure that its lubrication requirements are met under various operating conditions.

[0060] Optionally, the flow detection unit includes a seventh flow meter 34, which is provided on the return oil section of the lubricating oil circuit. The seventh flow meter 34 is located in the return oil section of the lubricating oil circuit and monitors the lubricating oil flow of the oil supply pump 12 to ensure that its lubrication requirements are met under various operating conditions.

[0061] In the above-mentioned embodiment, flow rate is an important indicator for measuring the fuel supply capacity and efficiency of the diesel engine common rail system. By configuring flow meters at key locations in the common rail system, the flow rate of oil and lubricant can be accurately measured, which plays a decisive role in evaluating the system's fuel supply stability and injection accuracy. The rational arrangement of flow meters not only solves the blind spots of flow monitoring in traditional testing, but also optimizes system design through data analysis and improves the utilization efficiency of oil and lubricant. In the testing of diesel engine common rail systems, the application of the test system in this embodiment includes, but is not limited to, flow response testing at different speeds, flow stability evaluation under different load conditions, and research on the impact of different oil products on the system flow characteristics, covering the core content of system performance testing.

[0062] According to one embodiment of the present invention, an embodiment of a method for testing a common rail system of a diesel engine is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0063] The method embodiment can be executed in a computer terminal or similar computing device that includes a memory and a processor in a vehicle. For example, if the method is executed on a computer terminal, Figure 3 As shown, the computer terminal may include one or more processors 102 (the processor may include but is not limited to a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microprocessor (MCU), a field programmable logic device (FPGA), a neural network processor (NPU), a tensor processing unit (TPU), an artificial intelligence (AI) type processor, etc.) and a memory 104 for storing data. Optionally, the computer terminal may also include a transmission device 106 for communication functions, an input and output device 108, and a display 110. It will be understood by those skilled in the art that Figure 3The structure shown is for illustration only and does not limit the structure of the computer terminal. For example, the computer terminal may include more or fewer components than those described above, or may have a configuration different from that described above.

[0064] The memory 104 can be used to store computer programs, such as software programs and modules of application software, such as the computer program corresponding to the diesel engine common rail system testing method in the embodiment of the present invention. The processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, thereby implementing the diesel engine common rail system testing method described above. The memory 104 may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely located relative to the processor 102, and these remote memories may be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0065] The transmission device 106 is used to receive or send data via a network. A specific example of the aforementioned network may include a wireless network provided by the mobile terminal's communications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0066] The display 110 may be, for example, a touch-screen liquid crystal display (LCD). The LCD may enable a user to interact with a user interface of the mobile terminal. In some embodiments, the mobile terminal may include a graphical user interface (GUI), and a user may interact with the GUI by finger contact and / or gestures on a touch-sensitive surface. The human-computer interaction functions herein may optionally include the following interactions: creating web pages, drawing, word processing, creating electronic documents, gaming, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital videos, playing digital music, and / or web browsing, etc. Executable instructions for executing the above-mentioned human-computer interaction functions are configured / stored in a computer program product or readable storage medium executable by one or more processors.

[0067] This embodiment provides a method for testing a diesel engine common rail system running on the above-mentioned computer terminal. Figure 4Flowchart of a method for testing a common rail system of a diesel engine according to one embodiment of the present invention. The method is based on the test system of the common rail system of a diesel engine in the above embodiment. Figure 4 As shown, the process includes the following steps:

[0068] Step S400 , in response to the completion of the connection of the test system of the diesel engine common rail system, controlling the drive module to enter the working mode to operate the fuel supply pump;

[0069] Step S410, obtaining the operating parameters of the diesel engine common rail system;

[0070] Step S420, determining whether the common rail system of the diesel engine is operating abnormally based on the operating condition parameters;

[0071] Step S430: When it is determined that the common rail system of the diesel engine is operating abnormally, the driving module is controlled to stop operating so as to stop the fuel supply pump.

[0072] Through the above steps, the testing method of this embodiment achieves an accurate assessment of the operating status of a diesel engine common rail system through automated control and real-time data collection. First, after the test system is successfully connected to the diesel engine common rail system, the driver module is activated to simulate the operation of the fuel pump under actual operating conditions. Subsequently, the detection module begins to collect system operating parameters, including but not limited to oil pressure, oil temperature, and oil flow. This data is key to assessing the health of the system. Next, based on the collected parameters, the controller determines whether the system has any operating anomalies, such as sudden oil pressure changes, excessive oil temperature, or unstable oil flow. If an anomaly is detected, the controller immediately instructs the driver module to stop operating and cuts off the power supply to the fuel pump, avoiding potential safety risks and equipment damage. This method not only improves the efficiency and safety of testing, but also enables the timely identification of potential system failure points through data analysis, providing a scientific basis for subsequent maintenance and optimization. In the testing of diesel engine common rail systems, the testing method of this embodiment can be applied to various aspects, including but not limited to performance verification in laboratory environments, quality control on production lines, and fault diagnosis during on-site maintenance. It covers all aspects from research and development to application, ensuring the stability and reliability of the system.

[0073] Optionally, there are multiple operating condition parameters, and the method further includes:

[0074] Step S421, determining whether each operating condition parameter exceeds the corresponding parameter threshold range;

[0075] Step S422 : When it is determined that a preset number of operating parameters are all outside the corresponding parameter threshold ranges, it is determined that the common rail system of the diesel engine is operating abnormally.

[0076] Through steps S421 and S422, during the test of the diesel engine common rail system, threshold ranges for multiple operating parameters are set to better determine the operating status of the system. Each operating parameter has its own specific threshold range, such as oil pressure, oil temperature, and oil flow. These thresholds reflect the parameter range of the system during normal operation. When a parameter is detected to be outside its threshold range, the system will issue a warning, indicating that a local fault may exist; if a preset number of parameters exceed the threshold at the same time, this usually indicates that the overall system operation is abnormal and immediate action is required. This method not only improves the accuracy of fault diagnosis, but also enables in-depth understanding of the root cause of the fault through correlation analysis between parameters, which plays an important role in fault prevention and design optimization.

[0077] In the testing of the diesel engine common rail system, the application of the testing method in this embodiment includes, but is not limited to, setting parameter thresholds under different operating conditions, evaluating parameter stability after long-term operation, and studying the impact of different oil products on parameter thresholds. It fully covers the needs of system performance testing and ensures the reliability and validity of the test results.

[0078] This application also provides a preferred embodiment of a test system and test method based on multimodal sensor data fusion, which is mainly used for reliability assessment and active safety control of diesel engine common rail systems. In this embodiment, the diesel engine high-pressure common rail system is suitable for use on V-type diesel engines.

[0079] Specifically, the diesel engine high-pressure common rail system comprises a mechanical system and an electronic control system. The mechanical system includes a fuel tank, a high-pressure common rail injection pump, a high-pressure common rail pipe, and injectors. The high-pressure common rail pipe comprises a first common rail pipe and a second common rail pipe, the main oil circuits of which are connected in series via the common rail pipe. Multiple injectors are provided, each connected to the main oil circuit of the first common rail pipe or the second common rail pipe via a second high-pressure oil pipe. The electronic control system comprises an electronic control unit (ECU), sensors, and actuators, with the ECU comprising two ECUs (Electronic Control Units). The diesel engine high-pressure common rail system offers the technical advantages of ensuring a fuel delivery rate that is doubled compared to a dual-plunger common rail injection pump under all operating conditions throughout its service life. This significantly increases the fuel delivery pump output, fuel metering valve flow, and high-pressure pump output. The common rail pressure can reach a maximum of 2000 bar, while the continuous operating pressure can be maintained at 1600 bar.

[0080] like Figure 1As shown, the side of the fuel injector is provided with an oil inlet and an oil return port, the fuel injector is mounted on the cylinder head, and the cylinder head has an oil chamber corresponding to the oil return port, and the oil chamber and the oil return port are seamlessly connected; the fuel inlet of the fuel injector is connected to one end of the high-pressure oil pipe through an oil inlet pipe, and the other end of the high-pressure oil pipe is fixed to the common rail pipe; the oil chamber is connected to the oil channel of the intake pipe, and the oil channel of the intake pipe is connected to the fuel tank through the oil return pipe. The solution provided by this application can save interconnected oil pipes in the common rail system, reduce the number of parts, and prevent the fuel from being contaminated by external dirt, reducing the risk of leakage. At the same time, it can reduce the occurrence of oil leakage during use, which can reduce costs.

[0081] Conventional reliability testing of common rail systems requires long periods of continuous operation, requiring manual inspection or operation to ensure proper testing. If a malfunction occurs during operation and the equipment fails to shut down automatically, damage to the common rail system or the testing equipment can occur, posing a safety hazard.

[0082] Specifically, the test system in this embodiment includes a drive module 11, a flow meter, a pressure sensor, a temperature sensor, and an ECU (Electronic Control Unit). The ECU is the aforementioned controller 13. It should be noted that the ECU here refers to the ECU of the test system, which is different from the ECU of the aforementioned common rail system.

[0083] Among them, the drive module 11 provides power to drive the oil supply pump 12 and the oil transfer pump to operate; the oil transfer pump provides lubricating oil and fuel primary pressure to reach a predetermined pressure, and the lubricating oil is used to lubricate the oil supply pump 12. The oil supply pump 12 pressurizes the fuel to provide high-pressure fuel, and delivers the high-pressure fuel to the rail pipe 15. The fuel enters the injector (including the first injector 16 and the second injector 17) through the rail pipe 15. The injector receives the fuel and injects fuel according to the control signal provided by the ECU.

[0084] The low-pressure oil circuit includes components such as temperature sensors, flow meters, oil pumps, low-pressure sensors, pressure sensors and pipelines; the high-pressure oil circuit includes components such as rail pipes 15, pressure regulating valves 19 and oil pipes; the lubricating oil circuit includes components such as temperature sensors, low-pressure sensors, flow meters, oil pumps and oil pipes; the signals include signals from the ECU, acquisition circuits and various sensors.

[0085] The test system in this embodiment is highly versatile and suitable for reliability testing of diesel engine common rail systems. The system incorporates numerous sensors, particularly those that detect rail pressure and the speed of the drive module 11. The parameters of each sensor are independent, and their control signals are staggered to minimize mutual interference. The ECU identifies the parameters returned by the sensors and establishes a safe parameter range within the system. Through algorithmic optimization, the system shuts down promptly when an abnormal signal is detected. This system's monitoring and assessment of key parameters ensures the safety of the test equipment.

[0086] Specifically, during the test, the various components of the system operate as follows:

[0087] The drive module 11 provides power to allow the oil supply pump 12 to operate at a predetermined speed. The two are connected by a transmission clamp, which can be freely replaced according to different models of oil supply pumps 12. During operation, the oil supply pump 12 requires lubricating oil under a specific pressure range. The lubricating oil circuit performs this function. After being powered on, the second oil pump 36 operates and sucks the lubricating oil in the lubricating oil tank 35 into the oil supply pump 12. The lubricating oil passes through the fourth temperature sensor 30, the third pressure sensor 31 (here is a low-pressure sensor) and the sixth flowmeter 32, and then enters the oil supply pump 12. After lubrication, the lubricating oil enters the seventh flowmeter 34 and the fifth temperature sensor 33 in sequence, and finally flows into the lubricating oil tank, forming a closed loop of the lubricating oil circuit.

[0088] When the fuel supply pump 12 is in operation, the first fuel delivery pump 23 operates to suck the fuel from the fuel tank 14, passes through the first temperature sensor 20, the second pressure sensor 21 (here is a low-pressure sensor) and the first flow meter 22, and then the fuel enters the internal oil circuit of the fuel supply pump 12. The fuel is pressurized by the fuel supply pump 12 and enters the high-pressure oil circuit.

[0089] Fuel enters rail pipe 15 through the high-pressure oil circuit, where it reaches a pressure preset by the ECU. Excess fuel flows out through pressure regulating valve 19, passes through third flowmeter 26, and ultimately returns to fuel tank 14. First pressure sensor 18 monitors the pressure in rail pipe 15 in real time and feeds the signal back to the ECU. Fuel in rail pipe 15 enters first and second injectors 16 and 17, where it completes injection. The injected fuel then passes through fourth flowmeter 27 and returns to fuel tank 14. During the injection process, some fuel returns from first and second injectors 16 and 17 through the oil circuit, enters fifth flowmeter 28, and then third temperature sensor 29. Finally, the fuel returns to fuel tank 14, completing a closed fuel cycle.

[0090] During operation of the system, the first pressure sensor 18 monitors the pressure of the rail pipe 15 in real time, and the third flowmeter 26 monitors the fuel return volume of the rail pipe 15; the fourth temperature sensor 30, the third pressure sensor 31, and the sixth flowmeter 32 monitor the temperature, pressure, and flow of the lubricating oil entering the fuel supply pump 12, and the seventh flowmeter 34 and the fifth temperature sensor 33 monitor the lubricating oil return temperature and flow of the fuel supply pump 12 in real time; the first temperature sensor 20, the second pressure sensor 21, and the first flowmeter 22 monitor the temperature, pressure, and flow of the fuel entering the fuel supply pump 12, and the second flowmeter 24 and the second temperature sensor 25 monitor the fuel return temperature and flow of the fuel supply pump 12 in real time; the fourth flowmeter 27 monitors the injection volume of the first injector 16 and the second injector 17, and the fifth flowmeter 28 and the third temperature sensor 29 monitor a portion of the fuel return from the first injector 16 and the second injector 17. When the system is running, the user can assign a safety zone to the flow meter, pressure, and temperature according to actual needs, and at the same time feed back the collected parameters such as the flow meter, pressure, temperature and the speed of the drive module 11 to the ECU in real time through the collection signal 37, and the various parameters do not interfere with each other. According to the internal algorithm, a logic judgment unit 40 is used (the logic judgment unit 40 can be integrated into the ECU or set independently) to perform logic judgment. If one or more of the collected values ​​exceeds the set safety zone, the ECU will feed back a shutdown signal to the drive module 11, control the system to shut down safely, and execute the second control circuit 39; if the collected parameters are in the normal area, the first control circuit 38 is executed, and the drive module 11 operates normally.

[0091] In the signal path connection mode, the ECU is controlled by wires, and the various components in the lubricating oil circuit, low-pressure oil circuit and high-pressure oil circuit are connected by oil pipes.

[0092] Furthermore, the test method is as follows: set the flow meter, pressure, and temperature to a safe area, and at the same time feed back the flow meter, pressure, temperature, and drive module speed parameters to the ECU in real time, and the various parameters do not interfere with each other. According to the algorithm, if one or more of the collected values ​​exceeds the set safe area, the ECU will shut down the drive module.

[0093] Applying the safe and reliable control strategy of this embodiment allows for early identification of common rail system faults during testing without requiring manual intervention or operation, thereby improving test efficiency and reducing costs. The test system and method of this embodiment are suitable for diesel engine common rail system R&D verification, fault diagnosis, and durability testing scenarios.

[0094] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0095] This embodiment also provides a test device for a diesel engine common rail system. This device is used to implement the above-mentioned embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0096] Figure 5 FIG. 1 is a structural block diagram of a test device for a common rail system of a diesel engine according to one embodiment of the present invention. Figure 5 As shown, the device includes: a first control module 50, which is used to control the drive module to enter the working mode in response to the completion of the connection of the test system of the diesel engine common rail system to enable the fuel supply pump to operate; an acquisition module 52, which is used to obtain the operating parameters of the diesel engine common rail system; a determination module 54, which is used to determine whether the diesel engine common rail system is operating abnormally based on the operating parameters; and a second control module 56, which is used to control the drive module to stop working in the case of determining that the diesel engine common rail system is operating abnormally, so as to stop the fuel supply pump from operating.

[0097] Through the above-described device, the test device in this embodiment achieves an accurate assessment of the operating status of a diesel engine common rail system through automated control and real-time data acquisition. First, after the test system is successfully connected to the diesel engine common rail system, the driver module is activated to simulate the operation of the fuel pump under actual operating conditions. Subsequently, the detection module begins to collect system operating parameters, including but not limited to oil pressure, oil temperature, and oil flow. This data is key to assessing the health of the system. Next, based on the collected parameters, the controller determines whether the system has any operating anomalies, such as sudden oil pressure changes, excessive oil temperature, or unstable oil flow. If an anomaly is detected, the controller immediately instructs the driver module to stop operating and cuts off the power supply to the fuel pump, avoiding potential safety risks and equipment damage. This method not only improves the efficiency and safety of testing, but also enables the timely identification of potential system failure points through data analysis, providing a scientific basis for subsequent maintenance and optimization. In the testing of diesel engine common rail systems, the test method of this embodiment can be applied to various aspects, including but not limited to performance verification in a laboratory environment, quality control on the production line, and fault diagnosis during on-site maintenance. It covers all links from research and development to application, ensuring the stability and reliability of the system.

[0098] It should be noted that the above modules can be implemented through software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0099] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored program. When the program is run, the computer-readable storage medium is controlled so that the device where the computer-readable storage medium is located executes the above-mentioned diesel engine common rail system testing method.

[0100] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0101] Step S1, in response to the completion of the connection of the test system of the diesel engine common rail system, controlling the drive module to enter the working mode to operate the fuel supply pump;

[0102] Step S2, obtaining operating parameters of the diesel engine common rail system; based on the operating parameters, determining whether the diesel engine common rail system is operating abnormally;

[0103] Step S3: When it is determined that the common rail system of the diesel engine is operating abnormally, the driving module is controlled to stop operating so as to stop the fuel supply pump.

[0104] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

[0105] An embodiment of the present invention further provides a processor, which is configured to run a computer program to execute the steps in any of the above method embodiments.

[0106] Optionally, in this embodiment, the processor may be configured to execute the following steps through a computer program:

[0107] Step S1, in response to the completion of the connection of the test system of the diesel engine common rail system, controlling the drive module to enter the working mode to operate the fuel supply pump;

[0108] Step S2, obtaining operating parameters of the diesel engine common rail system; based on the operating parameters, determining whether the diesel engine common rail system is operating abnormally;

[0109] Step S3: When it is determined that the common rail system of the diesel engine is operating abnormally, the driving module is controlled to stop operating so as to stop the fuel supply pump.

[0110] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0111] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0112] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0113] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0114] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0115] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A test system for a diesel engine common rail system, characterized in that: The test system comprises: A drive module (11), the drive module (11) being electrically connected to a fuel supply pump (12) of the diesel engine common rail system, the drive module (11) being used to drive the fuel supply pump (12) to operate; A detection module, the detection module is provided on the diesel engine common rail system, and the detection module is used to detect operating parameters of the diesel engine common rail system; A controller (13), wherein the controller (13) is electrically connected to the driving module (11) and the detection module.

2. The diesel engine common rail system test system according to claim 1, characterized in that: The detection module includes a plurality of detection units, each of which is electrically connected to the controller (13), each of which is controlled independently of the other, and the operating parameters detected by each of the detection units are set differently.

3. The diesel engine common rail system test system according to claim 2, characterized in that: The multiple detection units include a pressure detection unit, a temperature detection unit, and a flow detection unit. The pressure detection unit is used to detect the oil pressure of the diesel engine common rail system, the temperature detection unit is used to detect the oil temperature of the diesel engine common rail system, and the flow detection unit is used to detect the oil flow of the diesel engine common rail system.

4. The diesel engine common rail system test system according to claim 3, characterized in that: The diesel engine common rail system comprises a fuel supply pump (12), a rail pipe (15), a fuel injector, a lubricating oil circuit for lubricating the fuel supply pump (12), a low-pressure oil circuit for supplying fuel to the fuel supply pump (12), a pressure regulating oil circuit for connecting a pressure regulating port of the rail pipe (15) with a fuel tank (14), an injection oil circuit for connecting an injection port of the fuel injector with the fuel tank (14), a first oil return oil circuit for connecting an oil return port of the fuel injector with the fuel tank (14), and a second oil return oil circuit for connecting the oil return port of the fuel supply pump (12) with the fuel tank (14). The pressure detection unit comprises: a first pressure sensor (18), the first pressure sensor (18) being arranged on the rail tube (15), the first pressure sensor (18) being used to detect the oil pressure of the rail tube (15); and / or, a second pressure sensor (21), the second pressure sensor (21) being arranged on the low-pressure oil circuit; and / or A third pressure sensor (31) is provided on the oil inlet section of the lubricating oil circuit.

5. The diesel engine common rail system test system according to claim 4, characterized in that: The temperature detection unit includes: a first temperature sensor (20), the first temperature sensor (20) being arranged on the low-pressure oil circuit; and / or a second temperature sensor (25), the second temperature sensor (25) being arranged on the second oil return line; and / or a third temperature sensor (29), the third temperature sensor (29) being arranged on the first oil return line; and / or a fourth temperature sensor (30), the fourth temperature sensor (30) being arranged on the oil inlet section of the lubricating oil circuit; and / or, A fifth temperature sensor (33) is provided on the oil return section of the lubricating oil circuit.

6. The diesel engine common rail system test system according to claim 4, characterized in that: The flow detection unit includes: a first flow meter (22), the first flow meter (22) being arranged on the low-pressure oil line; and / or, a second flow meter (24), the second flow meter (24) being arranged on the second oil return line; and / or a third flow meter (26), the third flow meter (26) being arranged on the pressure regulating oil circuit; and / or a fourth flow meter (27), the fourth flow meter (27) being arranged on the injection oil path; and / or a fifth flow meter (28), the fifth flow meter (28) being arranged on the first oil return line; and / or a sixth flow meter (32), the sixth flow meter (32) being arranged on the oil inlet section of the lubricating oil circuit; and / or, A seventh flow meter (34) is provided on the oil return section of the lubricating oil circuit.

7. A method for testing a common rail system of a diesel engine, characterized in that: The method is performed based on a test system for a diesel engine common rail system according to any one of claims 1 to 6, and comprises the following steps: In response to the test system connection of the diesel engine common rail system being completed, controlling the drive module to enter a working mode to operate the fuel supply pump; Obtaining operating parameters of the diesel engine common rail system; determining, based on the operating condition parameters, whether the common rail system of the diesel engine is operating abnormally; When it is determined that the common rail system of the diesel engine is operating abnormally, the driving module is controlled to stop operating so as to stop the fuel supply pump from running.

8. The method according to claim 7, characterized in that There are multiple operating condition parameters, and the method further includes: Determining whether each of the operating condition parameters exceeds a corresponding parameter threshold range; When it is determined that a preset number of the operating condition parameters all exceed the corresponding parameter threshold ranges, it is determined that the common rail system of the diesel engine is operating abnormally.

9. A test device for a common rail system of a diesel engine, characterized in that: include: a first control module, configured to control the drive module to enter a working mode in response to completion of connection of the test system of the diesel engine common rail system, so as to operate the fuel supply pump; an acquisition module, the acquisition module being used to acquire operating parameters of the diesel engine common rail system; a determination module, the determination module being configured to determine whether the common rail system of the diesel engine is operating abnormally based on the operating condition parameters; The second control module is used to control the driving module to stop working when it is determined that the common rail system of the diesel engine is working abnormally, so as to stop the fuel supply pump from running.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is executed, the computer-readable storage medium is controlled, and the device in which the computer-readable storage medium is located executes the test method of the diesel engine common rail system according to claim 7 or 8.

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