Instantaneous injection flow testing system and method

Abstract

The invention provides an instantaneous injection flow test system and method, and the system comprises a constant-volume main body assembly which is provided with a test cavity, the test cavity is provided with a test installation port, and the test installation port is used for installing a gas injector to be tested; at least part of the transient pressure sensor is arranged in the test cavity, and the transient pressure sensor is used for detecting transient pressure data in the test cavity; at least part of the temperature sensor is arranged in the test cavity, and the temperature sensor is used for detecting temperature data in the test cavity; the mass flow detection module is communicated with the test cavity; and the control module is electrically connected with the gas ejector, the transient pressure sensor, the temperature sensor and the mass flow detection module. According to the invention, the response speed and the measurement precision of the test are greatly improved, and the problem of low sensitivity of micro flow measurement in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas injector testing, and in particular to an instantaneous injection flow rate testing system and method. Background Art

[0002] In the current field of gas injection technology, especially for gas fuel injectors used in internal combustion engines and gas engines, testing instantaneous flow and injection patterns is a crucial step. However, the accuracy of current gas flow measurement technology is often limited when faced with small flow rates or transient injection conditions. The sensor's resolution, response speed, and data acquisition frequency may not be sufficient to capture subtle changes in flow rate, especially at the moment of injection start and end. In addition, because the physical properties of gas change rapidly over time, existing sensors and data processing systems may be difficult to adjust in real time, resulting in measurement results that do not match the actual situation.

[0003] To address the above issues, no effective solutions have been proposed so far. Summary of the Invention

[0004] The main purpose of the present invention is to provide an instantaneous jet flow rate testing system and method to solve the problem of low sensitivity of tiny flow rate measurement in the prior art.

[0005] To achieve the above-mentioned objectives, according to one aspect of the present invention, a transient injection flow rate testing system is provided, comprising: a constant-volume main body assembly, the constant-volume main body assembly being provided with a test cavity, the test cavity having a test mounting port, the test mounting port being used to mount a gas injector to be tested; a transient pressure sensor, at least part of which is disposed in the test cavity, the transient pressure sensor being used to detect transient pressure data in the test cavity; a temperature sensor, at least part of which is disposed in the test cavity, the temperature sensor being used to detect temperature data in the test cavity; a mass flow rate detection module, the mass flow rate detection module being connected to the test cavity, the mass flow rate detection module being used to periodically obtain gas mass flow rate data in the test cavity; and a control module, the control module being electrically connected to the gas injector, the transient pressure sensor, the temperature sensor, and the mass flow rate detection module, respectively, the control module being used to control the gas injector to be in a first target injection operating mode, and the control module determining, based on the transient pressure data, the temperature data, and the gas mass flow rate data, the injection mass flow rate regularity curve data of the gas injector to be tested.

[0006] Furthermore, the constant volume body assembly includes: a constant volume body, the constant volume body is provided with a test cavity, and the constant volume body is provided with a first exhaust end; an exhaust solenoid valve, the first exhaust end is connected to the mass flow detection module through the exhaust solenoid valve, the exhaust solenoid valve is used to adjust the gas flow of the gas discharged from the constant volume body entering the mass flow detection module, the exhaust solenoid valve is electrically connected to the control module, and the control module is used to control the exhaust solenoid valve to be in the first target exhaust working mode.

[0007] Furthermore, the constant volume main body assembly also includes: a steady-state pressure sensor, at least part of the steady-state pressure sensor is arranged in the test cavity, the steady-state pressure sensor is used to detect the back pressure data in the test cavity, the steady-state pressure sensor is electrically connected to the control module, and the control module is used to control the gas injector to be in a second target injection working mode; a safety valve, the constant volume main body is provided with a second exhaust end, the safety valve is connected to the second exhaust end, the safety valve is electrically connected to the control module, the control module is used to control the safety valve to be in the second target exhaust working mode according to the back pressure data, and the second target exhaust working mode is used to exhaust and relieve the pressure of the test cavity.

[0008] Furthermore, the mass flow detection module includes: a gas-liquid separator, the first end of the gas-liquid separator is connected to the outlet of the test cavity, and the gas-liquid separator is used to separate the gas flowing out of the test cavity into gas and liquid; a drainage module, the drainage module is connected to the second end of the gas-liquid separator; a mass flow sensor, the first end of the mass flow sensor is connected to the third end of the gas-liquid separator, the mass flow sensor is electrically connected to the control module, and the mass flow sensor is used to detect the mass flow data of the gas after separation by the gas-liquid separator; an exhaust module, the exhaust module is connected to the second end of the mass flow sensor.

[0009] Furthermore, the drainage module includes: a drainage solenoid valve, the first end of the drainage solenoid valve is connected to the second end of the gas-liquid separator, the drainage solenoid valve is used to adjust the amount of liquid in the gas-liquid separator, the drainage solenoid valve is electrically connected to the control module, and the control module is used to control the drainage solenoid valve to be in a target drainage working mode; a liquid collecting tank, the liquid inlet end of the liquid collecting tank is connected to the second end of the drainage solenoid valve.

[0010] Furthermore, the exhaust module includes: a check valve, a first end of the check valve is connected to the second end of the mass flow sensor; and a gas collecting cavity, an air inlet end of the gas collecting cavity is connected to the second end of the check valve.

[0011] Furthermore, it also includes: a host computer, which is electrically connected to the control module, and is used to display and record pressure data, temperature data, gas mass flow data and jet mass flow rate regularity curve data, as well as obtain drive data of preset drive frequency and pulse width.

[0012] A method for testing instantaneous jet flow rate is applied to the above-mentioned instantaneous jet flow rate testing system, comprising: obtaining test data in response to a test request instruction, the test data including drive frequency and pulse width drive data; generating a first control instruction set and a second control instruction set based on the test data, the first control instruction set being used to control a gas injector to be in a first target injection working mode, and the second control instruction set being used to control an exhaust solenoid valve to be in an exhaust working mode with a preset frequency; periodically obtaining pressure data, temperature data, and gas mass flow rate data in response to the gas injector periodically completing the first target injection working mode; and determining jet mass flow rate regularity curve data based on the pressure data, temperature data, and gas mass flow rate data.

[0013] Furthermore, based on the pressure data, the temperature data and the gas mass flow rate data, the jet mass flow rate law curve data is determined, including: determining the first transient response curve data based on the first pressure data and the first temperature data after the first gas injector injection, the transient response curve data being the first pressure-temperature ratio change rate and time curve data; determining the first relationship coefficient based on the first gas mass flow rate data and the first transient response curve data after the first gas injector injection; determining the second transient response curve data based on the second pressure data and the second temperature data after the second gas injector injection; determining the jet mass flow rate time curve data based on the second transient response curve data and the first relationship coefficient; determining the jet mass flow rate time curve data based on the jet mass flow rate time curve data; and determining the jet mass flow rate law curve data based on the jet mass flow rate time curve data.

[0014] Furthermore, in response to the gas injector periodically completing the first target injection working mode, it also includes: generating a third control instruction set based on test data, the third control instruction set being used to control the gas injector to be in the second target injection working mode; in response to the gas injector completing the second target injection working mode, obtaining back pressure data; based on the back pressure threshold, judging the back pressure data to obtain a judgment result; in response to the judgment result that the back pressure data is greater than or equal to the back pressure threshold, controlling the gas injector to be in the first target injection working mode; in response to the judgment result that the back pressure data is less than the back pressure threshold, controlling the gas injector to be in the second target injection working mode.

[0015] The technical solution of the present invention is applied, by integrating a high-sensitivity transient sensor, a temperature sensor and a mass flow detection module, combining intelligent control and data analysis, and determining the jet mass flow rate regular curve through an intelligent algorithm based on the collected transient pressure data, temperature data and gas mass flow data, without the need for human intervention, thereby improving the measurement accuracy and efficiency, simplifying the test process, reducing costs, and greatly improving the test response speed and measurement accuracy, solving the problem of low sensitivity of small flow measurement in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A schematic structural diagram of a first embodiment of a transient injection flow rate testing system according to the present invention is shown;

[0018] Figure 2 A flow chart of a method for testing instantaneous injection flow rate according to one embodiment of the present invention is shown;

[0019] Figure 3 A flow chart of a method for testing instantaneous injection flow rate according to one embodiment of the present invention is shown;

[0020] Figure 4 shows a first transient response curve diagram in a transient injection flow rate testing method according to one embodiment of the present invention;

[0021] Figure 5 100 transient response curves are shown in a transient injection flow rate test method according to one embodiment of the present invention;

[0022] Figure 6 This is a structural block diagram of an instantaneous injection flow testing device provided in one embodiment of the present application.

[0023] The above drawings include the following reference numerals:

[0024] 1. Constant volume main body;

[0025] 2. Gas injector;

[0026] 3. Steady-state pressure sensor;

[0027] 4. Transient pressure sensor;

[0028] 5. Temperature sensor;

[0029] 6. Control module;

[0030] 7. Host computer;

[0031] 8. Check valve;

[0032] 9. Gas collecting cavity;

[0033] 10. Safety valve;

[0034] 11. Exhaust solenoid valve;

[0035] 12. Drain solenoid valve;

[0036] 13. Liquid collecting tank;

[0037] 14. Gas-liquid separator;

[0038] 15. Mass flow sensor. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application 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 terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, 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.

[0042] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0043] The performance of gas fuel injectors plays a central role in the design and optimization of modern internal combustion and gas engines. To achieve efficient and clean power output, precise control of the injector's instantaneous flow rate and injection pattern is becoming increasingly important, as this directly impacts the engine's combustion efficiency, power performance, and emissions control. However, existing gas injection flow measurement technologies face multiple challenges when dealing with low flow rates and transient injection conditions, limiting their application in precision measurement applications.

[0044] Measuring tiny flow rates requires extremely high-resolution sensors to capture subtle fluctuations in flow rate. Under transient injection conditions, flow rates change rapidly, and traditional sensors may not be able to provide the required level of resolution due to their inherent design limitations, resulting in the loss of critical information.

[0045] The sensor's response speed is key to capturing transient events. In micro-flow measurements, the flow rate changes extremely rapidly at the start and end of a gas injection. If the sensor's response speed is not fast enough, these instantaneous details will be missed, affecting measurement accuracy.

[0046] To fully capture dynamic processes, the data acquisition system needs to record sensor output at a sufficiently high frequency. In transient injection measurements, if the data acquisition frequency is lower than the flow rate variation frequency, the flow rate curve over time cannot be accurately depicted, thus hindering the understanding and analysis of the injection pattern.

[0047] The physical properties of gases, such as density, viscosity, and heat capacity, vary with temperature and pressure. Under transient injection conditions, these rapid changes in physical properties can affect the gas flow state and sensor response characteristics, increasing the uncertainty of measurement results. For example, at the beginning of injection, the sudden entry of gas into the chamber causes the temperature and pressure within the chamber to rise rapidly, which in turn affects the gas density. Existing flow calculation methods often assume stable physical properties. When this assumption is violated, the measurement results will deviate from the true value.

[0048] In transient injection testing, the temperature and pressure of gases can change significantly within milliseconds. However, traditional data processing systems can struggle to keep up with these rapid changes, making it impossible to dynamically adjust conversion factors and other key parameters, resulting in distorted measurement results.

[0049] Flow measurement typically involves the combined calculation of multiple physical quantities, such as indirectly calculating flow rate by monitoring changes in pressure and temperature. During transient testing, even the slightest error in each sensor can be amplified in the final flow calculation, reducing the overall measurement accuracy of the system.

[0050] During transient injection, the flow rate variation pattern can be very complex, including multiple phases such as rise, peak, fall, and fluctuation. Existing data processing systems may not have sufficient analytical capabilities to extract the subtle characteristics of the injection pattern from transient data, thus hindering the comprehensive evaluation of injector performance.

[0051] In summary, current gas jet flow measurement technology is subject to multiple limitations such as sensor performance, physical property changes, and data processing system capabilities when dealing with small flow rates and transient jet conditions.

[0052] Combine Figure 1 As shown, according to a specific embodiment of the present application, a transient injection flow rate testing system is provided, including: a constant volume main body assembly, a temperature sensor 5, a transient pressure sensor 4, a mass flow rate detection module and a control module 6, the constant volume main body assembly is provided with a test cavity, the test cavity has a test installation port, the test installation port is used to install the gas injector 2 to be tested, at least part of the transient pressure sensor 4 is arranged in the test cavity, the transient pressure sensor 4 is used to detect transient pressure data in the test cavity, at least part of the temperature sensor 5 is arranged in the test cavity, the temperature sensor 5 is used to detect temperature data in the test cavity, the mass flow rate detection module is connected to the test cavity, the mass flow rate detection module is used to periodically obtain gas mass flow rate data in the test cavity, the control module 6 is electrically connected to the gas injector 2, the transient pressure sensor 4, the temperature sensor 5 and the mass flow rate detection module respectively, the control module 6 is used to control the gas injector 2 to be in a first target injection working mode, and the control module 6 determines the injection mass flow rate regularity curve data of the gas injector 2 to be tested based on the transient pressure data, the temperature data and the gas mass flow rate data.

[0053] By applying this embodiment, a highly sensitive transient pressure sensor 4, a temperature sensor 5, and a mass flow detection module are integrated and coordinated, combined with intelligent control and data analysis, and based on the collected transient pressure data, temperature data, and gas mass flow data, an intelligent algorithm is used to determine the jet mass flow rate regular curve without manual intervention, thereby improving the measurement accuracy and efficiency, simplifying the test process, reducing costs, and greatly improving the test response speed and measurement accuracy, thereby solving the problem of low sensitivity of micro flow measurement in the prior art.

[0054] Furthermore, the constant volume body assembly includes: a constant volume body 1 and an exhaust solenoid valve 11. The constant volume body 1 is provided with a test cavity. The constant volume body 1 is provided with a first exhaust end. The first exhaust end is connected to the mass flow detection module through the exhaust solenoid valve 11. The exhaust solenoid valve 11 is used to adjust the gas flow rate of the gas discharged from the constant volume body 1 entering the mass flow detection module. The exhaust solenoid valve 11 is electrically connected to the control module 6. The control module 6 is used to control the exhaust solenoid valve 11 to be in the first target exhaust working mode.

[0055] The constant volume body 1 provides a stable and controlled environment through the test cavity inside it, which is especially important for the transient injection flow test of the gas injector. Under constant volume conditions, any changes in pressure and temperature caused by the injector spraying gas can be directly attributed to the injection event itself, eliminating the interference of external variables, thereby ensuring the accuracy and reliability of the measurement results. The constant volume test environment allows each test to be carried out under the same conditions, improving the repeatability of the experiment. The exhaust solenoid valve 11 is electrically connected to the control module 6, so that it can flexibly adjust the gas flow discharged by the constant volume body 1 under the instruction of the control module. This dynamic control mechanism is very important for handling transient injection conditions because it can ensure that after the injection, the gas in the chamber can be discharged in a predetermined manner without affecting the initial conditions of the next test, so that each test result is as close to the ideal state as possible.

[0056] The control module 6 can accurately control the working mode of the exhaust solenoid valve 11, so that it responds quickly and adjusts to the first target exhaust working mode. This precise control not only improves the test efficiency, but also ensures that the initial pressure and temperature state in the constant volume body can be quickly restored during the instantaneous injection test, avoiding measurement errors caused by a slow or unstable exhaust process. The pressure in the constant volume body can be effectively managed during the test to prevent damage to system components caused by abnormal pressure increases. In addition, precise control of the exhaust flow rate also helps to protect the mass flow detection module and avoid measurement errors or equipment damage that may be caused by excessive gas shock. The connection between the exhaust solenoid valve 11 and the mass flow detection module facilitates the comprehensive control and data analysis of the system, enabling the control module 6 to adjust the test strategy based on real-time flow data, such as dynamically adjusting the injection frequency or optimizing the design parameters of the injector, thereby optimizing the overall performance of the system.

[0057] Furthermore, the constant volume main body assembly also includes: a steady-state pressure sensor 3 and a safety valve 10, at least part of the steady-state pressure sensor 3 is arranged in the test cavity, the steady-state pressure sensor 3 is used to detect the back pressure data in the test cavity, the steady-state pressure sensor 3 is electrically connected to the control module 6, the control module 6 is used to control the gas injector 2 to be in the second target injection working mode, the constant volume main body 1 is provided with a second exhaust end, the safety valve 10 is connected to the second exhaust end, the safety valve 10 is electrically connected to the control module 6, the control module 6 is used to control the safety valve 10 to be in the second target exhaust working mode according to the back pressure data, and the second target exhaust working mode is used to exhaust and relieve the pressure of the test cavity.

[0058] The steady-state pressure sensor 3 can detect backpressure data within the test cavity in real time, which is crucial for simulating the backpressure conditions of the injector in its actual operating environment. Backpressure refers to the pressure at the injector outlet, which directly affects the velocity and flow rate of the injected gas. Through continuous monitoring by the steady-state pressure sensor 3, the system can ensure that the backpressure within the test cavity remains stable at a preset target value, thereby more accurately reflecting the performance of the injector under specific backpressure conditions. The safety valve 10 is primarily used to provide emergency exhaust and pressure relief to the test cavity in unexpected situations to prevent system damage or safety accidents caused by excessive pressure. By monitoring the reading of the steady-state pressure sensor 3, the control module 6 can immediately activate the second target exhaust operating mode of the safety valve 10 once the backpressure exceeds the backpressure threshold, thereby promptly releasing the pressure within the chamber. Combining the backpressure monitoring of the steady-state pressure sensor 3 and the intelligent control of the safety valve 10, the system can simulate a variety of backpressure environments and conduct a comprehensive performance evaluation of the injector, including the injection characteristics and stability under high or low pressure.

[0059] In an exemplary embodiment, the mass flow detection module includes: a gas-liquid separator 14, a drainage module, a mass flow sensor 15 and an exhaust module. The first end of the gas-liquid separator 14 is connected to the outlet of the test cavity, and the gas-liquid separator 14 is used to separate the gas flowing out of the test cavity into gas and liquid. The drainage module is connected to the second end of the gas-liquid separator 14, the first end of the mass flow sensor 15 is connected to the third end of the gas-liquid separator 14, the mass flow sensor 15 is electrically connected to the control module 6, the mass flow sensor 15 is used to detect the mass flow data of the gas after separation by the gas-liquid separator 14, and the exhaust module is connected to the second end of the mass flow sensor 15.

[0060] As one of the core components of the mass flow detection module, the gas-liquid separator 14 has the primary task of separating the gas and liquid in the mixture recovered from the test cavity to ensure that only pure gas enters the subsequent measurement process. In the gas injector test, the injected gas may carry trace amounts of liquid. If not separated, the presence of these liquids will interfere with the measurement of the gas mass flow rate, resulting in inaccurate readings. The use of the gas-liquid separator 14 effectively solves this problem and improves the accuracy of the measurement results. The drainage module is connected to the liquid outlet of the gas-liquid separator 14 and is specifically responsible for processing and removing the separated liquid.

[0061] The mass flow sensor 15 directly measures the mass flow of pure gas after passing through the gas-liquid separator 14. Compared with the traditional volume flow conversion, this direct measurement method can significantly reduce the errors caused by temperature and pressure changes and provide more accurate flow data. The electrical connection between the mass flow sensor 15 and the control module 6 means that it can feed back real-time gas mass flow data to the control center for processing and analysis. This instant feedback mechanism enables the system to dynamically adjust the working mode of the injector according to the actual measurement results during the test, optimize the test process, and improve the validity of the data. The exhaust module is connected to the outlet of the mass flow sensor 15. Its function is to exhaust the gas in the chamber after the test cycle is completed, preparing for the next round of testing. Through the intelligent scheduling of the control module 6, the exhaust module can accurately control gas emissions, ensure that the test cavity can quickly return to its initial state after each round of testing, and maintain stable test conditions.

[0062] Furthermore, the drainage module includes: a drainage solenoid valve 12 and a liquid collecting tank 13. The first end of the drainage solenoid valve 12 is connected to the second end of the gas-liquid separator 14. The drainage solenoid valve 12 is used to adjust the amount of liquid in the gas-liquid separator 14. The drainage solenoid valve 12 is electrically connected to the control module 6. The control module 6 is used to control the drainage solenoid valve 12 to be in the target drainage working mode. The liquid inlet end of the liquid collecting tank 13 is connected to the second end of the drainage solenoid valve 12.

[0063] The drain solenoid valve 12 achieves precise control of the amount of liquid after separation through its first end connected to the second end of the gas-liquid separator 14. This fine management capability is crucial to maintaining the purity of the test environment, especially when conducting gas injector performance tests, avoiding the impact of liquid residue on subsequent gas mass flow measurements, and ensuring the accuracy and reliability of the data. The electrical connection between the drain solenoid valve 12 and the control module 6 enables it to automatically adjust the opening and closing state and the discharge rate according to the target drain working mode instruction sent by the control module. This intelligent response mechanism not only improves the efficiency of the drain process, but also enhances the overall flexibility and adaptability of the system. It can be quickly adjusted according to different test requirements to ensure a smooth test process.

[0064] In addition to being able to test and analyze the pure gas injection flow and regularity, the gas-liquid separator 14 can also accurately test and analyze the flow and regularity of applications in scenarios such as gas containing water and oil, thereby improving the breadth and adaptability of the gas objects being tested and expanding the scope of application.

[0065] The liquid collecting tank 13, as the terminal component of the drainage module, is responsible for collecting the liquid discharged by the drainage solenoid valve 12. This design avoids the scattering of liquid at the test site, simplifies the cleaning of the test environment and system maintenance, and reduces the risk of liquid contaminating other equipment or affecting the test environment. The automatic control of the drainage solenoid valve 12 and the centralized treatment of liquid in the liquid collecting tank 13 achieve seamless connection and efficient circulation of the test process. After each injection test, the drainage module can quickly clear the liquid in the chamber, creating clean starting conditions for the next round of testing, greatly improving the continuity and efficiency of the test, and shortening the product iteration and R&D cycle.

[0066] In this embodiment, the exhaust module includes a check valve 8 and a gas collection chamber 9. The first end of the check valve 8 is connected to the second end of the mass flow sensor 15, and the air inlet end of the gas collection chamber 9 is connected to the second end of the check valve 8. The presence of the check valve 8 effectively prevents reverse impact of gas or liquid, which plays an important protective role for precision measuring equipment such as the mass flow sensor 15. It can prevent internal wear or damage caused by reverse flow, thereby extending the service life of the entire test system and reducing maintenance costs. The gas collection chamber 9 provides a buffer and collection space for gas exiting the mass flow sensor 15. It not only helps collect gas discharged during the test, but also stabilizes the gas flow rate, reducing turbulence and pulsation during gas discharge, thereby optimizing the gas discharge process throughout the entire test process. The close connection between the check valve 8 and the gas collection chamber 9 forms a complete gas discharge and collection system, ensuring the continuity and efficiency of the gas injector performance testing process. The tested gas can quickly pass through the check valve 8 and enter the gas collection chamber 9, creating good starting conditions for the next round of testing.

[0067] In an exemplary embodiment, it also includes: a host computer 7, which is electrically connected to the control module 6, and the host computer 7 is used to display and record pressure data, temperature data, gas mass flow data and jet mass flow rate regularity curve data, as well as to obtain drive data of preset drive frequency and pulse width. Through the host computer 7, the tester can easily adjust the drive frequency and pulse width of the ejector according to the experimental requirements, and realize rapid switching between different working modes. This flexibility not only improves the test efficiency, but also expands the application range of the system, making it capable of handling more types of test tasks and meeting different research and engineering needs. The host computer 7 is usually equipped with a user-interactive graphical interface, so that even users who are not very familiar with the technology can easily understand and operate complex test systems. This interface design lowers the operating threshold and promotes effective collaboration and communication between multidisciplinary teams.

[0068] According to an embodiment of the present invention, a method for testing instantaneous injection flow is provided. In the embodiment, 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.

[0069] The method embodiment can be executed in an electronic device or similar computing device including a memory and a processor. Taking running on a controller as an example, the controller may include one or more processors (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 microcontroller unit (MCU), a programmable logic device (Field Programmable Gate Array, FPGA), a neural network processor (NPU), a tensor processing unit (TPU), an artificial intelligence (AI) type processor, etc.) and a memory for storing data. Optionally, the above-mentioned controller may also include a transmission device, an input and output device, and a display device for communication functions. It will be understood by those skilled in the art that the above-mentioned structural description is only illustrative and does not limit the structure of the above-mentioned controller. For example, the controller may also include more or fewer components than the above-mentioned structural description, or have a configuration different from the above-mentioned structural description.

[0070] The memory can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the instantaneous jet flow test method in the embodiment of the present invention. The processor executes various functional applications and data processing by running the computer program stored in the memory, that is, implementing the above-mentioned instantaneous jet flow test method. The memory 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 may further include a memory remotely located relative to the processor, and these remote memories can 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.

[0071] The transmission device is used to receive or send data via a network. Specific examples of the aforementioned network may include a wireless network provided by a communications provider of the mobile terminal. In one embodiment, the transmission device includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one embodiment, the transmission device can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0072] The display device can be, for example, a touch-screen liquid crystal display (LCD) and a touch display (also referred to as a "touch screen" or "touch display"). The liquid crystal display enables the user to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), and the user can interact with the GUI by finger contacts and / or gestures on the touch-sensitive surface. The human-computer interaction functions here optionally include the following interactions: creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital videos, playing digital music and / or web browsing, etc. The executable instructions for performing 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.

[0073] According to another specific embodiment of the present application, a method for testing instantaneous injection flow is also provided. Figure 2 and Figure 3 As shown, the instantaneous injection flow rate test system mentioned above is applied to the instantaneous injection flow rate test method, which includes the following steps:

[0074] S110, in response to the test request instruction, obtaining test data, the test data including: driving frequency and pulse width driving data;

[0075] In step S110, when the system receives a test request, the host computer or control center immediately responds and begins preparing the parameters required for the test. This "test request" can be initiated by the experimental operator or part of a pre-set program within the system to regularly check injector performance. In responding to the test request, the host computer retrieves drive frequency and pulse width data from a preset database or user input. These data are key parameters in the gas injector's injection process, determining the intensity, duration, and frequency of the injection. Obtaining this data enables the system to customize the injector's drive according to test requirements, whether for routine performance evaluation, extreme condition testing, or verification of a specific injection pattern. The process of responding to test requests and acquiring drive data is fundamental to ensuring efficient, accurate, and safe gas injector performance testing. It not only demonstrates the intelligence of modern test systems but also provides strong support for promoting scientific research innovation, engineering optimization, and the development of industry standards.

[0076] S120, generating a first control instruction set and a second control instruction set based on the test data, wherein the first control instruction set is used to control the gas injector to operate in a first target injection mode, and the second control instruction set is used to control the exhaust solenoid valve to operate in an exhaust mode at a preset frequency;

[0077] In step S120, the first set of control instructions enables the gas injector to precisely adjust its injection mode based on specific test requirements, such as drive frequency and pulse width. This allows the injector to perform injection under highly customized conditions, improving the control precision of the injection process and ensuring the accuracy and reliability of test results. For example, by adjusting the injection frequency and pulse width, testers can meticulously explore the transient response characteristics of the gas injector under different operating conditions, thereby optimizing its design or evaluating its performance.

[0078] The second control instruction set focuses on controlling the exhaust frequency of the exhaust solenoid valve to ensure that the pressure conditions in the test chamber can be quickly and stably restored to the predetermined state. This preset exhaust frequency mode effectively addresses pressure fluctuations after injection, reducing test cycle extensions and data deviations caused by slow pressure recovery, thereby improving overall test efficiency and data consistency.

[0079] The precise execution of the first and second control instruction sets not only improves test accuracy but also reduces test risks by ensuring that the gas injector and exhaust solenoid valve operate within a safe range. For example, the preset frequency exhaust mode prevents excessive pressure in the test chamber, while the control of the first target injection mode avoids excessive load on the injector. This safety mechanism is crucial for maintaining the safety of test personnel, protecting expensive test equipment, and ensuring the legitimacy of test data.

[0080] When the injector needs to be tested with backpressure, a third set of control instructions is generated to direct the gas injector to first operate in the second target injection mode. This mode adjustment may involve fine-tuning multiple parameters such as injection frequency, pulse width, and injection pressure, aiming to bring the injector's operating state closer to ideal test conditions while also predicting and preparing the backpressure environment required for the next injection. This data-based, dynamic control instruction generation strategy demonstrates the system's high adaptability and intelligence, effectively responding to changes in operating conditions during testing and ensuring the accuracy and consistency of injector performance evaluation.

[0081] Based on the preset backpressure threshold, the real-time backpressure data is judged to obtain a judgment result. This result directly determines the selection of the next round of injection mode: if the backpressure data is greater than or equal to the threshold, it means that the current backpressure conditions have met the test requirements. The system will control the gas injector to return to the first target injection working mode, that is, the optimal or standard injection mode, for the next round of periodic injection; conversely, if the backpressure data is less than the threshold, the system will control the gas injector to remain in the second target injection working mode, and adjust the injection parameters to build or maintain the required backpressure conditions until the backpressure reaches or exceeds the threshold. The entire process constitutes a closed-loop control mechanism to ensure that the backpressure conditions are always maintained within the set threshold range. This precise backpressure management not only improves the reliability of the test results, but also avoids test discontinuities and data deviations caused by backpressure fluctuations, thereby optimizing the entire test process and improving test efficiency and data quality.

[0082] By periodically executing this dynamic adjustment and backpressure monitoring process, the system can adaptively modify injection patterns and threshold settings to address the complexities introduced by varying gas types, changing environmental conditions, or fluctuations in test equipment performance. This adaptive capability makes the test system more flexible, enabling it to maintain high performance and accuracy under a variety of operating conditions, providing strong support for in-depth research and performance optimization of gas injectors.

[0083] S140, in response to the gas injector periodically completing the first target injection operating mode, periodically acquiring pressure data, temperature data, and gas mass flow data;

[0084] In step S140, pressure data, temperature data, and gas mass flow rate data are automatically collected during the gas injection process according to a preset period. This timed monitoring mechanism ensures data continuity and real-time performance, helping to capture the transient characteristics of the injector during different injection phases and providing timely and accurate data support for subsequent performance analysis. By periodically acquiring data, the system can establish a complete and detailed data record, including dynamic data on the injector's pressure changes, temperature fluctuations, and gas mass flow rate during each injection cycle.

[0085] S160 , determining jet mass flow rate regularity curve data based on the pressure data, the temperature data, and the gas mass flow data.

[0086] In step S160, during gas injector performance testing, accurately measuring the transient response characteristics is crucial for evaluating the injector's dynamic performance, optimizing the injection pattern, and improving the operating efficiency of the gas engine. The following method details how to determine the injector's transient response characteristics and the injection mass flow rate pattern curve data, starting from raw test data and performing multiple analysis and calculation steps.

[0087] After the gas injector completes its first injection, the system immediately records the first pressure and temperature data within the constant-volume body. These data reflect the changing state of gas pressure and temperature at the moment of injection. Based on the first pressure and temperature data after the first injection, the pressure-to-temperature ratio is calculated and the derivative of this ratio over time is taken to determine the transient response curve data. This curve depicts the temporal trend of the rate of change of the pressure-to-temperature ratio during the initial injection phase and represents the core characteristic of the injector's transient response. Next, the first gas mass flow rate data after the first injection is analyzed. This mass flow rate data is directly measured by a Coriolis mass flowmeter and represents the actual injection efficiency of the injector at a specific moment. By comparing the first transient response curve data with the first gas mass flow rate data, the system can determine the functional relationship between the two, namely the first relationship coefficient. This coefficient is an important indicator of the mathematical relationship between the injection mass flow rate and the transient response curve data (the rate of change of the pressure-to-temperature ratio versus time curve data), laying the foundation for subsequent analysis.

[0088] After the gas injector completes the second injection, the system records the second pressure data and the second temperature data again. Similar to the first time, the system calculates the ratio of pressure to temperature change and plots the second transient response curve data. This process is crucial for understanding the transient response of the injector in different injection cycles and helps identify potential performance differences or changes in the injection pattern. Figure 4As shown in Figure 1, the second transient response curve data is correlated with the correlation coefficients determined initially to infer the jet mass flow rate time curve data. This calculation step allows the jet mass flow rate to be estimated over time based on the transient response curve data, even without directly measuring the mass flow rate for each injection cycle.

[0089] The pressure data, temperature data and injection mass flow rate time curve data calculated based on the relationship coefficient after each injection are continuously collected to form a comprehensive data set. Figure 5 The figure shows a superposition of 100 transient response curves. This dataset not only contains information about a single injection but also reflects the average performance and variation of the injector over multiple injection cycles. Based on the jet mass flow rate time curve dataset, statistical and data analysis methods are used to extract the jet mass flow rate regularity curve data. This allows for diagnosis of a specific abnormal injection and consistency analysis of multiple injection patterns. This is particularly important for engine gas injection testing applications, providing new insights for obtaining a reasonable injection pattern, improving the power and economy of gas engines, and improving emissions, thereby enhancing the accuracy of measurement results.

[0090] In this embodiment, determining the jet mass flow rate regularity curve data based on the pressure data, temperature data, and gas mass flow rate data includes: determining first transient response curve data based on first pressure data and first temperature data after the first gas injector injection, the transient response curve data being first pressure-temperature ratio change rate-time curve data; determining a first relationship coefficient based on the first gas mass flow rate data and the first transient response curve data after the first gas injector injection; determining second transient response curve data based on second pressure data and second temperature data after the second gas injector injection; determining jet mass flow rate time curve data based on the second transient response curve data and the first relationship coefficient; determining a jet mass flow rate time curve data based on the jet mass flow rate time curve data; and determining the jet mass flow rate regularity curve data based on the jet mass flow rate time curve data.

[0091] The above-described optional embodiment of the present application can achieve the following beneficial effects: By analyzing the ratio change rate of pressure and temperature data after the first injection, the system can accurately capture the injector's response characteristics under transient conditions, including key parameters such as the pressure change rate at the start of injection and the temperature fluctuation amplitude. This accurate depiction of transient response characteristics provides a foundation for understanding the injector's dynamic performance. Based on the correlation between the first gas mass flow rate data and the transient response curve data, the system determines the first-time relationship coefficient. This coefficient is essentially a key parameter in the mathematical model, quantifying the impact of pressure and temperature changes on mass flow. By continuously recording pressure and temperature data after injection and constructing a transient response curve based on this data, the system can adaptively adjust the test strategy to ensure consistent injection conditions and comparable test results. The jet mass flow rate time curve data from multiple injections is integrated into a single dataset, which contains the injection characteristics of the injector at different cycles. This dataset not only helps to identify long-term trends in injection patterns but also allows for comparative analysis of injector performance stability, providing comprehensive data support for fault diagnosis and performance optimization.

[0092] Furthermore, in response to the gas injector periodically completing the first target injection working mode, it also includes: generating a third control instruction set based on test data, the third control instruction set being used to control the gas injector to be in the second target injection working mode; in response to the gas injector completing the second target injection working mode, obtaining back pressure data; based on the back pressure threshold, judging the back pressure data to obtain a judgment result; in response to the judgment result that the back pressure data is greater than or equal to the back pressure threshold, controlling the gas injector to be in the first target injection working mode; in response to the judgment result that the back pressure data is less than the back pressure threshold, controlling the gas injector to be in the second target injection working mode.

[0093] The aforementioned optional embodiments of the present application can achieve the following beneficial effects: By combining dynamic control with backpressure monitoring, they enable adaptive injection pattern adjustment and precise control of backpressure conditions during gas injector performance testing, significantly improving test accuracy, efficiency, and adaptability. This strategy, through the establishment of a closed-loop control mechanism that automates backpressure monitoring and injector operating mode adjustment, not only simplifies the testing process and reduces human intervention, but also ensures the reliability of test results and the safety of the testing environment, providing a solid foundation for the optimization and innovation of gas injection technology.

[0094] Figure 6 FIG. 1 is a structural block diagram of a device for testing instantaneous jet flow according to one embodiment of the present invention. Figure 6 The device comprises:

[0095] A first acquisition module is configured to acquire test data in response to a test request instruction, wherein the test data includes: driving frequency and pulse width driving data;

[0096] a control instruction module, configured to generate, based on the test data, a first control instruction set and a second control instruction set, wherein the first control instruction set is configured to control the gas injector to operate in the first target injection mode, and the second control instruction set is configured to control the exhaust solenoid valve to operate in an exhaust mode with a preset frequency;

[0097] a second acquisition module, configured to periodically acquire the pressure data, the temperature data, and the gas mass flow rate data in response to the gas injector periodically completing the first target injection operation mode;

[0098] A law determination module is used to determine the jet mass flow rate law curve data based on the pressure data, the temperature data and the gas mass flow data.

[0099] 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.

[0100] According to one embodiment of the present invention, an electronic device is provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the instantaneous injection flow rate test method described above when running.

[0101] Optionally, in this embodiment, the processor may be configured to execute the following steps through a computer program:

[0102] Step S1, in response to a test request instruction, obtaining test data, the test data including: driving frequency and pulse width driving data;

[0103] Step S2, generating a first control instruction set and a second control instruction set based on the test data, wherein the first control instruction set is used to control the gas injector to be in the first target injection operating mode, and the second control instruction set is used to control the exhaust solenoid valve to be in an exhaust operating mode with a preset frequency;

[0104] Step S3, in response to the gas injector periodically completing the first target injection operating mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data;

[0105] Step S4 : in response to the gas injector periodically completing the first target injection operation mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data.

[0106] According to one embodiment of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program runs, the device where the storage medium is located is controlled to execute the above-mentioned instantaneous injection flow test method.

[0107] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0108] Step S1, in response to a test request instruction, obtaining test data, the test data including: driving frequency and pulse width driving data;

[0109] Step S2, generating a first control instruction set and a second control instruction set based on the test data, wherein the first control instruction set is used to control the gas injector to be in the first target injection operating mode, and the second control instruction set is used to control the exhaust solenoid valve to be in an exhaust operating mode with a preset frequency;

[0110] Step S3, in response to the gas injector periodically completing the first target injection operating mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data;

[0111] Step S4 : in response to the gas injector periodically completing the first target injection operation mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data.

[0112] 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.

[0113] According to one embodiment of the present invention, a computer program product is further provided, including a computer program. When the computer program is executed by a processor, the computer program implements the above-mentioned instantaneous injection flow rate testing method.

[0114] Optionally, in this embodiment, the computer program product may be configured as a computer program for executing the following steps:

[0115] Step S1, in response to a test request instruction, obtaining test data, the test data including: driving frequency and pulse width driving data;

[0116] Step S2, generating a first control instruction set and a second control instruction set based on the test data, wherein the first control instruction set is used to control the gas injector to be in the first target injection operating mode, and the second control instruction set is used to control the exhaust solenoid valve to be in an exhaust operating mode with a preset frequency;

[0117] Step S3, in response to the gas injector periodically completing the first target injection operating mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data;

[0118] Step S4 : in response to the gas injector periodically completing the first target injection operation mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data.

[0119] In this application, a plurality refers to two or more.

[0120] In this application, unless otherwise expressly defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application.

[0121] The terms "first," "second," "third," "fourth," etc. (if any) in this application are used to distinguish similar objects and are not necessarily used to describe a particular sequential order.

[0122] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0123] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly. For example, a statement that the method includes steps A and B indicates that the method may include steps A and B performed sequentially, or steps B and A performed sequentially. For example, a statement that the method may also include step C indicates that step C may be added to the method in any order, for example, the method may include steps A, B, and C, or steps A, C, and B, or steps C, A, and B, etc.

[0124] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

[0125] In this application, a plurality refers to two or more.

[0126] In this application, unless otherwise expressly defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application.

[0127] The terms "first," "second," "third," "fourth," etc. (if any) in this application are used to distinguish similar objects and are not necessarily used to describe a particular sequential order.

[0128] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0129] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly. For example, a statement that the method includes steps A and B indicates that the method may include steps A and B performed sequentially, or steps B and A performed sequentially. For example, a statement that the method may also include step C indicates that step C may be added to the method in any order, for example, the method may include steps A, B, and C, or steps A, C, and B, or steps C, A, and B, etc.

[0130] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A transient jet flow test system, characterized in that: include: A constant volume main body assembly, the constant volume main body assembly being provided with a test cavity, the test cavity having a test installation port, the test installation port being used to install a gas injector (2) to be tested; a transient pressure sensor (4), at least a portion of the transient pressure sensor (4) being provided in the test cavity, the transient pressure sensor (4) being used to detect transient pressure data in the test cavity; a temperature sensor (5), at least a portion of the temperature sensor (5) being disposed in the test cavity, the temperature sensor (5) being used to detect temperature data in the test cavity; a mass flow detection module, the mass flow detection module being in communication with the test cavity and being configured to periodically acquire gas mass flow data within the test cavity; A control module (6) is electrically connected to the gas injector (2), the transient pressure sensor (4), the temperature sensor (5) and the mass flow detection module respectively, the control module (6) is used to control the gas injector (2) to be located in a first target injection working mode, and the control module (6) determines the injection mass flow rate regularity curve data of the gas injector (2) to be tested based on the transient pressure data, the temperature data and the gas mass flow data.

2. The instantaneous jet flow rate testing system according to claim 1, characterized in that: The constant volume main body assembly comprises: A constant volume body (1), the constant volume body (1) being provided with the test cavity, and the constant volume body (1) being provided with a first exhaust end; An exhaust solenoid valve (11), wherein the first exhaust end is connected to the mass flow detection module through the exhaust solenoid valve (11), and the exhaust solenoid valve (11) is used to adjust the gas flow of the gas discharged from the constant volume body (1) into the mass flow detection module, and the exhaust solenoid valve (11) is electrically connected to the control module (6), and the control module (6) is used to control the exhaust solenoid valve (11) to be located in a first target exhaust working mode.

3. The instantaneous jet flow rate testing system according to claim 2, characterized in that: The constant volume main body assembly further includes: a steady-state pressure sensor (3), at least a portion of the steady-state pressure sensor (3) being disposed in the test cavity, the steady-state pressure sensor (3) being used to detect back pressure data in the test cavity, the steady-state pressure sensor (3) being electrically connected to the control module (6), the control module (6) being used to control the gas injector (2) to be in a second target injection operating mode; A safety valve (10), wherein the constant volume body (1) is provided with a second exhaust end, the safety valve (10) is connected to the second exhaust end, the safety valve (10) is electrically connected to the control module (6), and the control module (6) is used to control the safety valve (10) to be located in a second target exhaust working mode according to the back pressure data, and the second target exhaust working mode is used to exhaust and relieve the pressure of the test cavity.

4. The instantaneous jet flow rate testing system according to claim 1, characterized in that: The mass flow detection module includes: a gas-liquid separator (14), a first end of the gas-liquid separator (14) being in communication with an outlet of the test cavity, and the gas-liquid separator (14) being used for performing gas-liquid separation on the gas flowing out of the test cavity; a liquid drainage module, the liquid drainage module being in communication with the second end of the gas-liquid separator (14); a mass flow sensor (15), wherein a first end of the mass flow sensor (15) is connected to a third end of the gas-liquid separator (14), the mass flow sensor (15) is electrically connected to the control module (6), and the mass flow sensor (15) is used to detect gas mass flow data after separation by the gas-liquid separator (14); An exhaust module is connected to the second end of the mass flow sensor (15).

5. The instantaneous jet flow rate testing system according to claim 4, characterized in that: The drainage module comprises: a liquid discharge solenoid valve (12), wherein a first end of the liquid discharge solenoid valve (12) is connected to a second end of the gas-liquid separator (14), the liquid discharge solenoid valve (12) is used to adjust the amount of liquid in the gas-liquid separator (14), the liquid discharge solenoid valve (12) is electrically connected to the control module (6), and the control module (6) is used to control the liquid discharge solenoid valve (12) to be located in a target liquid discharge working mode; A liquid collecting tank (13), wherein the liquid inlet end of the liquid collecting tank (13) is connected to the second end of the liquid discharge solenoid valve (12).

6. The instantaneous jet flow rate testing system according to claim 4, characterized in that: The exhaust module comprises: a check valve (8), wherein a first end of the check valve (8) is connected to a second end of the mass flow sensor (15); A gas collecting cavity (9), wherein the gas inlet end of the gas collecting cavity (9) is connected to the second end of the check valve (8).

7. The instantaneous jet flow rate testing system according to claim 1, characterized in that: Also includes: A host computer (7) is electrically connected to the control module (6), and the host computer (7) is used to display and record the pressure data, the temperature data, the gas mass flow data, and the jet mass flow rate regularity curve data, and to obtain drive data of a preset drive frequency and pulse width.

8. A method for testing instantaneous jet flow rate, applied to the instantaneous jet flow rate testing system according to any one of claims 1 to 7, characterized in that: include: In response to a test request instruction, acquiring test data, the test data including: driving frequency and pulse width driving data; generating, based on the test data, a first control instruction set and a second control instruction set, wherein the first control instruction set is used to control the gas injector to be in the first target injection operating mode, and the second control instruction set is used to control the exhaust solenoid valve to be in an exhaust operating mode with a preset frequency; In response to the gas injector periodically completing the first target injection operating mode, periodically acquiring the pressure data, the temperature data, and the gas mass flow data; The jet mass flow rate regularity curve data is determined based on the pressure data, the temperature data and the gas mass flow data.

9. The instantaneous injection flow rate testing method according to claim 8, characterized in that: Determining the jet mass flow rate regularity curve data based on the pressure data, the temperature data, and the gas mass flow data includes: Determining first transient response curve data based on first pressure data and first temperature data after the gas injector is first injected, wherein the transient response curve data is first pressure-temperature ratio change rate versus time curve data; determining a first relationship coefficient based on first gas mass flow data after the gas injector is injected for the first time and the first transient response curve data; determining second transient response curve data based on second pressure data and second temperature data after the gas injector injects for the second time; determining the jet mass flow rate time curve data based on the second transient response curve data and the first relationship coefficient; determining a jet mass flow rate time curve data set based on the jet mass flow rate time curve data; The jet mass flow rate regularity curve data is determined based on the jet mass flow rate time curve data set.

10. The instantaneous injection flow rate testing method according to claim 8, characterized in that: In response to the gas injector periodically completing the first target injection operation mode, the method further includes: generating a third control instruction set based on the test data, wherein the third control instruction set is used to control the gas injector to be in a second target injection operating mode; acquiring back pressure data in response to the gas injector completing the second target injection operating mode; Based on the back pressure threshold, the back pressure data is judged to obtain a judgment result; In response to the judgment result that the back pressure data is greater than or equal to the back pressure threshold, controlling the gas injector to be in the first target injection operating mode; In response to the determination that the back pressure data is less than the back pressure threshold, the gas injector is controlled to be in the second target injection operation mode.

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