Test system for flow control valves and control method for test system

Abstract

This application relates to a testing system for a flow control valve and a control method for the testing system. It includes: a fuel supply module, connected to both the inlet and outlet of the flow control valve under test, for supplying fuel at a preset pressure to the flow control valve and forming a circuit with the inlet and outlet of the flow control valve; wherein the flow control valve includes a sealed chamber disposed between the inlet and outlet; a flow sensor, disposed at the outlet of the flow control valve, for measuring a first flow rate at the outlet of the flow control valve; a pressure sensor, connected to the sealed chamber, for measuring the pressure within the sealed chamber; and a processing module, electrically connected to both the flow sensor and the pressure sensor, for determining the characteristics of the flow control valve based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor. This enables the testing of the characteristics of the flow control valve under actual working conditions.

Description

Technical Field

[0001] This application relates to the field of automotive testing technology, and in particular to a test system for a flow control valve and a control method for the test system. Background Technology

[0002] With the development of automotive technology and increasing public awareness of environmental protection, the demands for energy conservation and emission reduction in automobiles are also rising. The fuel injection system is a crucial component of a vehicle, responsible for injecting fuel for engine combustion. The injection characteristics of the system directly affect engine performance and vehicle emissions. These characteristics are controlled by the flow control valve within the injection system. The flow control valve's characteristics significantly influence the opening and closing speed and injection stability of the injection system, thus impacting vehicle emissions. Therefore, it is necessary to test the characteristics of the flow control valve. Summary of the Invention

[0003] Therefore, it is necessary to provide a test system for flow control valves and a control method for the test system that can test the characteristics of flow control valves, in order to address the above-mentioned technical problems.

[0004] A testing system for a flow control valve includes: a fuel supply module connected to the inlet and outlet of the flow control valve under test, for supplying fuel at a preset pressure to the flow control valve and forming a circuit with the inlet and outlet of the flow control valve, wherein the flow control valve includes a sealed chamber disposed between the inlet and outlet; a flow sensor disposed at the outlet of the flow control valve for measuring a first flow rate at the outlet of the flow control valve; a pressure sensor connected to the sealed chamber for measuring the pressure within the sealed chamber; and a processing module electrically connected to the flow sensor and the pressure sensor for determining the characteristics of the flow control valve based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor.

[0005] In one embodiment, the processing module is configured to determine a first flow curve based on the first flow within a set time period when the first flow is less than the upper limit of the measurement range of the flow sensor, wherein the first flow curve serves as the flow characteristic of the flow control valve when fuel is injected at the preset pressure.

[0006] In one embodiment, the processing module is further configured to determine whether the flow characteristics of the flow control valve to be tested meet the standard based on the first flow curve and the standard flow curve corresponding to the preset pressure.

[0007] In one embodiment, the processing module is configured to determine an actual pressure curve based on the pressure measured by the pressure sensor within a set time period when the first flow rate reaches the upper limit of the measurement range of the flow sensor, and to determine a second flow curve based on the actual pressure curve, wherein the actual pressure curve serves as the pressure characteristic of the flow control valve when fuel is injected at the preset pressure, and the second flow curve serves as the flow characteristic of the flow control valve when fuel is injected at the preset pressure.

[0008] In one embodiment, the processing module is further configured to determine whether the flow characteristics of the flow control valve to be tested meet the standard based on the second flow curve and the standard flow curve corresponding to the preset pressure, and to determine whether the pressure characteristics of the flow control valve to be tested meet the standard based on the actual pressure curve and the standard pressure curve corresponding to the preset pressure.

[0009] In one embodiment, the fuel supply module includes: a fuel tank connected to the outlet of the flow control valve, the fuel tank being used to store fuel; a fuel pump connected to the fuel tank at its inlet, the fuel pump being used to adjust the fuel pressure; a accumulator connected to the fuel pump at its inlet and the flow control valve at its outlet, the accumulator being used to maintain the fuel pressure; and a controller electrically connected to the fuel pump, used to control the fuel pump to adjust the fuel to the preset pressure.

[0010] In one embodiment, the test system for the flow control valve further includes a one-way valve disposed between the fuel supply pump and the accumulator chamber to prevent fuel from flowing from the accumulator chamber to the fuel supply pump.

[0011] In one embodiment, the test system for the flow control valve further includes: an injector, in which the flow control valve is disposed, the injector being used to determine whether to inject fuel based on the pressure within the sealed chamber; and a controller electrically connected to both the injector and the flow control valve, for controlling the operating state of the injector and the opening degree of the flow control valve.

[0012] In one embodiment, the test system for the flow control valve further includes a display module electrically connected to the processing module, used to display that the flow control valve under test is qualified when the flow characteristics of the flow control valve under test meet the standard.

[0013] A control method for a test system of a flow control valve, applied to the aforementioned test system of a flow control valve, the method comprising:

[0014] The fuel supply module is controlled to supply fuel at a preset pressure to the flow control valve;

[0015] The flow rate at the outlet of the flow control valve is obtained as measured by the flow sensor.

[0016] The pressure inside the sealed cavity is obtained by the pressure sensor.

[0017] The characteristics of the flow control valve are determined based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor.

[0018] The aforementioned test system and control method for the flow control valve, by incorporating a fuel supply module, can provide fuel at a preset pressure to the flow control valve, thereby simulating the actual working environment when the valve is installed in a vehicle, thus improving the accuracy of subsequent tests. A flow sensor can measure the initial flow rate at the valve's outlet. A pressure sensor can measure the pressure within the valve's sealed chamber. A processing module can determine the flow control valve's characteristics based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor. This enables the testing of the flow control valve's characteristics under actual working conditions, and the resulting test results more closely reflect the valve's actual operating state. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a test system for a flow control valve in one embodiment;

[0021] Figure 2 This is a schematic diagram of the standard pressure curve range in one embodiment;

[0022] Figure 3 This is a schematic diagram of the test system for the flow control valve in another embodiment;

[0023] Figure 4 This is a schematic diagram of the test system for the flow control valve in another embodiment;

[0024] Figure 5 This is a schematic diagram of the test system for the flow control valve in another embodiment;

[0025] Figure 6This is a schematic diagram of the test system for the flow control valve in another embodiment;

[0026] Figure 7 This is a schematic diagram of the processing module in one embodiment;

[0027] Figure 8 This is a flowchart illustrating the control method of a test system for a flow control valve in one embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10-Fuel supply module, 20-Flow sensor, 30-Pressure sensor, 40-Processing module, 50-Flow control valve, 11-Fuel tank, 12-Fuel supply pump, 13-Accumulator chamber, 14-Controller, 15-Check valve, 60-Injector, 70-Display module, 41-Data acquisition unit, 42-Data calculation unit, 43-Parameter setting unit, 44-Flow curve judgment unit, 45-Pressure curve judgment unit, 46-Data storage unit, 47-Data analysis unit. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0033] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “under,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0034] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0035] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0036] In one embodiment, such as Figure 1 As shown, a test system for a flow control valve is provided, comprising: a fuel supply module 10, a flow sensor 20, a pressure sensor 30, and a processing module 40, wherein:

[0037] The fuel supply module 10 is connected to the inlet and outlet of the flow control valve 50 to be tested, respectively, and is used to supply fuel at a preset pressure to the flow control valve 50, and form a loop with the inlet and outlet of the flow control valve 50. The flow control valve 50 includes a sealed chamber disposed between the inlet and outlet.

[0038] The flow control valve 50 is used to control the injection state of the injector 60 or the operating state of the fuel supply pump 12. The flow control valve 50 includes a sealed chamber. Taking the injector 60 as an example, the injection valve of the injector 60 opens when the pressure in the sealed chamber of the flow control valve 50 is less than a set value, allowing the injector 60 to inject fuel. Conversely, the injection valve of the injector 60 closes when the pressure in the sealed chamber of the flow control valve 50 is greater than the set value, stopping fuel injection. Therefore, the flow control valve 50 has a decisive influence on the opening and closing speed of the injection valve of the injector 60 and the injection stability of the injector 60. Furthermore, the pressure in the sealed chamber of the flow control valve 50 is closely related to the characteristics of the flow control valve 50. Therefore, it is necessary to test and inspect the characteristics of the flow control valve 50 to ensure the precise operation of the injector 60.

[0039] The fuel supply module 10 provides fuel at a preset pressure to the flow control valve 50 under test, thereby simulating the working environment of the flow control valve 50 when it is installed on the injector 60 in actual use, thus improving the accuracy of the test on the flow control valve 50. This ensures that the test data obtained using the device of this application matches the data when the flow control valve 50 is actually in use, improving the reliability of subsequent data.

[0040] The fuel supply module 10 is connected to the inlet and outlet of the flow control valve 50 to be tested, forming a loop with the inlet and outlet of the flow control valve 50. Thus, the fuel supplied by the fuel supply module 10 to the flow control valve 50 only plays a control role and is recyclable, making it more environmentally friendly. It is only used to adjust the pressure of the sealed chamber of the flow control valve 50.

[0041] The flow sensor 20 is installed at the outlet of the flow control valve 50 to measure the first flow rate at the outlet of the flow control valve 50.

[0042] The flow sensor 20 is installed at the outlet of the flow control valve 50 and can continuously measure and record the initial flow rate at the outlet of the flow control valve 50. A flow sensor 20 with a corresponding specification and range can be selected based on the actual parameters of the flow control valve 50.

[0043] Pressure sensor 30 is connected to the sealed chamber and is used to measure the pressure inside the sealed chamber.

[0044] The pressure sensor 30 is connected to the sealed chamber and can convert the pressure inside the sealed chamber into an electrical signal for transmission. A pressure sensor 30 with a corresponding specification and range can be selected based on the parameters of the actual flow control valve 50.

[0045] The processing module 40 is electrically connected to the flow sensor 20 and the pressure sensor 30 respectively, and is used to determine the characteristics of the flow control valve 50 based on the flow rate measured by the flow sensor 20 and the pressure measured by the pressure sensor 30.

[0046] The processing module 40 is electrically connected to the flow sensor 20 and the pressure sensor 30, respectively. It can analyze the flow data measured by the flow sensor 20 and the pressure data measured by the pressure sensor 30, and then determine the characteristics of the flow control valve 50 based on the combined flow data and pressure data.

[0047] In this embodiment, by providing a fuel supply module 10, fuel at a preset pressure can be supplied to the flow control valve 50, thereby simulating the actual working environment of the flow control valve 50 when it is installed in a vehicle, thus improving the accuracy of subsequent tests. By providing a flow sensor 20, the initial flow rate at the outlet of the flow control valve 50 can be measured. By providing a pressure sensor 30, the pressure within the sealed chamber of the flow control valve 50 can be measured. By providing a processing module 40, the characteristics of the flow control valve 50 can be determined based on the flow rate measured by the flow sensor 20 and the pressure measured by the pressure sensor 30. This enables the testing of the characteristics of the flow control valve 50 under actual working conditions, and the obtained test results are more consistent with the actual working state of the flow control valve 50.

[0048] In one embodiment, the processing module is used to determine a first flow curve based on the first flow within a set time period when the first flow is less than the upper limit of the measurement range of the flow sensor, wherein the first flow curve serves as the flow characteristics of the flow control valve when fuel is injected at a preset pressure.

[0049] The flow control valve receives high-pressure fuel within its sealed chamber, which can temporarily store the fuel. The volume of this chamber is variable to allow for adjustments to different fuel pressures. The flow rate at the valve's outlet is related to the valve's opening degree, specifications, and the pressure within the sealed chamber. When the initial flow rate at the valve's outlet is less than the upper limit of the flow sensor's measurement range, the flow sensor's measurement of the initial flow rate is accurate. Therefore, the initial flow rate curve is obtained based on the continuous measurement of the initial flow rate by the flow sensor within a set time period. This initial flow rate curve can then be used as the flow characteristic of the flow control valve when fuel is injected at a preset pressure, thus testing the change in the outlet flow rate of the flow control valve when fuel is injected at a preset pressure.

[0050] In this embodiment, the processing module determines a first flow curve based on the first flow rate measured by the flow sensor within a set time period. This yields the flow rate variation pattern at the outlet of the flow control valve under test when fuel is injected at a preset pressure. This facilitates the design of other components when the flow control valve is subsequently used in a vehicle, thereby reducing vehicle emissions.

[0051] In one embodiment, the processing module is further configured to determine whether the flow characteristics of the flow control valve under test meet the standard based on the first flow curve and the standard flow curve corresponding to the preset pressure.

[0052] The processing module contains a pre-set standard flow curve corresponding to a preset pressure. The processing module can compare the first flow curve with the standard flow curve corresponding to the preset pressure to determine the matching degree between the first flow curve and the standard flow curve corresponding to the preset pressure. If the matching degree is not qualified, it means that the flow characteristics of the flow control valve are not up to standard. If the matching degree is qualified, it means that the flow characteristics of the flow control valve are up to standard.

[0053] In this embodiment, the first flow curve can characterize the actual flow characteristics of the flow control valve. By comparing it with the standard flow curve, it can be determined whether the actual flow characteristics of the flow control valve meet the standard.

[0054] In one embodiment, the processing module is used to determine an actual pressure curve based on the pressure measured by a pressure sensor within a set time period when the first flow rate reaches the upper limit of the measurement range of the flow sensor, and to determine a second flow curve based on the actual pressure curve. The actual pressure curve serves as the pressure characteristic of the flow control valve when fuel is injected at a preset pressure, and the second flow curve serves as the flow characteristic of the flow control valve when fuel is injected at a preset pressure.

[0055] The flow rate at the outlet of the flow control valve is related to the valve's opening degree, specifications, and the pressure within the sealing chamber. Since the sealing chamber contains high-pressure fuel, the flow rate at the outlet may become excessive, exceeding the upper limit of the flow sensor's measurement range. When this limit is exceeded, the flow sensor cannot measure the flow rate at the outlet. The actual pressure curve is determined based on the pressure measured by the pressure sensor within a set time period. Because the pressure within the sealing chamber is related to the amount of fuel, the pressure changes as fuel flows out of the outlet. Therefore, a second flow rate curve can be calculated from the actual pressure curve, indirectly revealing the flow characteristics of the flow control valve.

[0056] In this embodiment, the processing module determines the second flow curve based on the pressure measured by the pressure sensor within a set time period, thus obtaining the flow rate change pattern of the outlet of the flow control valve under test when fuel is injected at a preset pressure. This facilitates the design of other components when the flow control valve is actually used in a vehicle, thereby reducing vehicle emissions.

[0057] In one embodiment, the processing module is further configured to determine whether the flow characteristics of the flow control valve under test meet the standard based on the second flow curve and the standard flow curve corresponding to the preset pressure, and to determine whether the pressure characteristics of the flow control valve under test meet the standard based on the actual pressure curve and the standard pressure curve corresponding to the preset pressure.

[0058] The processing module includes a pre-set standard flow curve corresponding to a preset pressure. It compares the second flow curve with this standard flow curve to determine the degree of matching. If the matching is unsatisfactory, the flow characteristics of the flow control valve are substandard; if the matching is satisfactory, the flow characteristics are compliant. The processing module also includes a standard pressure curve corresponding to the preset pressure. It similarly compares the actual pressure curve with this standard pressure curve to determine the degree of matching, thereby judging whether the pressure characteristics of the flow control valve meet the standards.

[0059] For example, such as Figure 2 The diagram shows the preset standard pressure curves within the processing module, which also include upper and lower flow limit pressure curves. As long as the actual pressure curve remains between these two curves, the pressure characteristics of the flow control valve are considered to meet the standards. If the actual pressure curve exceeds the upper flow limit pressure curve, it indicates that the pressure in the flow control valve's sealing chamber is too high when fuel is injected at the preset pressure, which could be dangerous. Conversely, if the actual pressure curve exceeds the lower flow limit pressure curve, it indicates that the pressure in the flow control valve's sealing chamber is too low when fuel is injected at the preset pressure, resulting in insufficient flow.

[0060] In this embodiment, by determining whether the flow characteristics of the flow control valve meet the standards, the qualification of the flow control valve can be judged. Only flow control valves with qualified flow characteristics can be used in vehicles. By testing whether the pressure characteristics of the flow control valve meet the standards, unqualified flow control valves can be manufactured. Only flow control valves with qualified pressure characteristics can be used in vehicles.

[0061] In one embodiment, such as Figure 3 As shown, the fuel supply module includes: a fuel tank 11, a fuel pump 12, a pressure accumulator 13, and a controller 14, wherein:

[0062] The fuel tank 11 is connected to the outlet of the flow control valve 50, and the fuel tank 11 is used to store fuel.

[0063] The fuel tank 11 is connected to the outlet of the flow control valve 50 and the inlet of the fuel pump 12, respectively, and can provide and store fuel.

[0064] The inlet of the fuel supply pump 12 is connected to the fuel tank 11, and the fuel supply pump 12 is used to adjust the fuel pressure.

[0065] The fuel pump 12 can draw fuel from the fuel tank 11 and pressurize the fuel to achieve the required pressure.

[0066] The inlet of the accumulator 13 is connected to the outlet of the fuel pump 12, and the outlet of the accumulator 13 is connected to the inlet of the flow control valve 50. The accumulator 13 is used to maintain the pressure of the fuel.

[0067] The accumulator 13 is used to store pressure and maintain the pressure of the fuel. When the fuel pressure is insufficient, it can replenish the fuel pressure.

[0068] The controller 14 is electrically connected to the fuel supply pump 12 and is used to control the fuel supply pump 12 to adjust the fuel to a preset pressure.

[0069] The controller 14 can control the operation of the fuel pump 12, thereby adjusting the fuel pressure to a preset pressure to meet the working requirements of the flow control valve 50 and providing the flow control valve 50 with fuel at a pressure that matches its working scenario.

[0070] For example, the pipes connecting the oil tank 11, the oil supply pump 12, the accumulator 13, and the flow control valve 50 are all high-pressure resistant hoses, capable of withstanding the flow of high-pressure fuel.

[0071] In this embodiment, fuel tank 11 is provided to store fuel. Fuel supply pump 12, accumulator 13, and controller 14 are provided to supply fuel at a preset pressure to flow control valve 50. This ensures that the flow control valve 50 is supplied with fuel at a pressure suitable for its operating environment, improving the accuracy of subsequent tests on the flow control valve 50.

[0072] In one embodiment, such as Figure 4 As shown, the test system for the flow control valve also includes a check valve 15, which is disposed between the fuel supply pump 12 and the accumulator 13 to prevent fuel from flowing from the accumulator 13 to the fuel supply pump 12.

[0073] The one-way valve 15 allows fuel to flow from the fuel supply pump 12 to the accumulator 13 and prevents fuel from flowing from the accumulator 13 to the fuel supply pump 12, thereby ensuring the direction of fuel flow.

[0074] In this embodiment, by setting a one-way valve 15, fuel can be prevented from flowing from the accumulator 13 to the fuel supply pump 12, thus ensuring the direction of fuel flow and guaranteeing the stability of the system operation of this application.

[0075] In one embodiment, such as Figure 5 As shown, the test system for the flow control valve also includes an injector 60. The flow control valve 50 is disposed in the injector 60, which is used to determine whether to inject fuel based on the pressure in the sealed chamber.

[0076] The injector 60 is the injection assembly on the vehicle where the flow control valve 50 is actually installed. The injector 60 determines whether to inject fuel based on the pressure inside the sealed chamber.

[0077] The controller 14 is electrically connected to the injector 60 and the flow control valve 50 respectively, and is used to control the working state of the injector 60 and the opening degree of the flow control valve 50.

[0078] The controller 14 can control the operating state of the injector 60 and the opening degree of the flow control valve 50, thus facilitating the simulation of the actual operating environment of the flow control valve 50 installed in the injector 60. This makes the characteristics of the flow control valve 50 obtained from the test more consistent with reality.

[0079] In this embodiment, by setting up an injector 60, the flow control valve 50 is installed on the injector 60 for testing, thereby better simulating the actual working environment of the flow control valve 50, and making it easier to test and obtain the characteristics of the flow control valve 50 that are more in line with the actual working conditions.

[0080] In one embodiment, such as Figure 6 As shown, the test system for the flow control valve also includes a display module 70. The display module 70 is electrically connected to the processing module 40 and is used to display that the flow control valve 50 under test is qualified when the flow characteristics of the flow control valve 50 under test meet the standards.

[0081] In this embodiment, by providing a display module 70, the flow control valve 50 under test can be displayed as qualified when its flow characteristics meet the standards. This allows users to intuitively check whether the flow control valve 50 is qualified.

[0082] In one embodiment, such as Figure 7 As shown, the processing module specifically includes: a data acquisition unit 41, a data calculation unit 42, a parameter setting unit 43, a flow curve judgment unit 44, a pressure curve judgment unit 45, a data storage unit 46, and a data analysis unit 47. Wherein:

[0083] The data acquisition unit 41 is electrically connected to the flow sensor 20 and the pressure sensor 30 respectively, and is used to receive the signals emitted by the flow sensor 20 and the pressure sensor 30.

[0084] The data calculation unit 42 is electrically connected to the data acquisition unit 41 and can calculate the flow rate and pressure based on the signals emitted by the flow sensor 20 and the pressure sensor 30.

[0085] The parameter setting unit 43 is electrically connected to the data calculation unit 42. It can receive user commands and adjust the data processing range that the data calculation unit 42 can calculate according to the user commands. It can also adjust the standard flow curve, standard pressure curve, etc.

[0086] For example, the parameter setting unit 43 allows users to adjust various calculation parameters in the processing module 40 according to actual needs.

[0087] Both the flow curve judgment unit 44 and the pressure curve judgment unit 45 are electrically connected to the data calculation unit 42. The flow curve judgment unit 44 can compare the flow curve calculated by the data calculation unit 42 with the standard flow curve. The pressure curve judgment unit 45 can compare the pressure curve calculated by the data calculation unit 42 with the standard pressure curve.

[0088] The data storage unit 46 is electrically connected to the flow curve judgment unit 44 and the pressure curve judgment unit 45 respectively, and can store the flow comparison results and the pressure comparison results.

[0089] The data analysis unit 47 is electrically connected to the data storage unit 46 and can analyze the flow comparison results and pressure comparison results to determine whether the flow control valve 50 meets the standards.

[0090] The display module 70 is electrically connected to the data analysis unit 47 and can display whether the flow control valve 50 meets the standard.

[0091] In this embodiment, the specific composition of the processing module 40 is provided, thereby enabling the collection and analysis of flow data and pressure data.

[0092] In one embodiment, such as Figure 8 As shown, a control method for a test system of a flow control valve is provided, applied to the aforementioned test system of a flow control valve. The method includes:

[0093] Step S100: Control the fuel supply module to supply fuel at a preset pressure to the flow control valve.

[0094] Step S110: Obtain the flow rate at the outlet of the flow control valve as measured by the flow sensor.

[0095] Step S120: Obtain the pressure inside the sealed chamber as measured by the pressure sensor.

[0096] Step S130: Determine the characteristics of the flow control valve based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor.

[0097] In this embodiment, fuel at a preset pressure is supplied to the flow control valve to simulate the actual operating environment when the flow control valve is installed in a vehicle, thereby improving the accuracy of subsequent tests. The first flow rate at the outlet of the flow control valve is measured. The pressure within the sealed chamber of the flow control valve is measured. Based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor, the characteristics of the flow control valve are determined. This allows for the testing of the flow control valve's characteristics under actual operating conditions, and the resulting test results more closely reflect the actual operating state of the flow control valve.

[0098] It should be understood that, although Figure 8 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 8 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0099] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0100] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A testing system for a flow control valve, characterized in that, include: A fuel supply module is connected to the inlet and outlet of the flow control valve to be tested, respectively, for supplying fuel at a preset pressure to the flow control valve and forming a loop with the inlet and outlet of the flow control valve, wherein the flow control valve includes a sealed chamber disposed between the inlet and outlet; A flow sensor is installed at the outlet of the flow control valve to measure the first flow rate at the outlet of the flow control valve. A pressure sensor, connected to the sealed chamber, is used to measure the pressure inside the sealed chamber; The processing module is electrically connected to the flow sensor and the pressure sensor respectively, and is used to determine the characteristics of the flow control valve based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor. The processing module is used to determine a first flow curve based on the first flow within a set time period when the first flow is less than the upper limit of the measurement range of the flow sensor, wherein the first flow curve serves as the flow characteristic of the flow control valve when fuel is injected at the preset pressure. The processing module is used to determine an actual pressure curve based on the pressure measured by the pressure sensor within a set time period when the first flow rate reaches the upper limit of the measurement range of the flow sensor, and to determine a second flow curve based on the actual pressure curve. The actual pressure curve serves as the pressure characteristic of the flow control valve when fuel is injected at the preset pressure, and the second flow curve serves as the flow characteristic of the flow control valve when fuel is injected at the preset pressure.

2. The test system for the flow control valve according to claim 1, characterized in that, The processing module is also used to determine whether the flow characteristics of the flow control valve to be tested meet the standard based on the first flow curve and the standard flow curve corresponding to the preset pressure.

3. The test system for the flow control valve according to claim 1, characterized in that, The processing module is further configured to determine whether the flow characteristics of the flow control valve to be tested meet the standard based on the second flow curve and the standard flow curve corresponding to the preset pressure, and to determine whether the pressure characteristics of the flow control valve to be tested meet the standard based on the actual pressure curve and the standard pressure curve corresponding to the preset pressure.

4. The test system for the flow control valve according to any one of claims 1-3, characterized in that, The fuel supply module includes: The fuel tank is connected to the outlet of the flow control valve and is used to store fuel. A fuel supply pump, the inlet of which is connected to the fuel tank, is used to adjust the fuel pressure; The accumulator chamber has its inlet connected to the outlet of the fuel supply pump and its outlet connected to the inlet of the flow control valve. The accumulator chamber is used to maintain the pressure of the fuel. The controller, electrically connected to the fuel supply pump, is used to control the fuel supply pump to adjust the fuel to the preset pressure.

5. The test system for the flow control valve according to claim 4, characterized in that, The test system for the flow control valve also includes a one-way valve, disposed between the fuel supply pump and the accumulator, for preventing fuel from flowing from the accumulator to the fuel supply pump.

6. The test system for the flow control valve according to claim 4, characterized in that, The testing system for the flow control valve also includes: An injector, wherein the flow control valve is disposed in the injector, the injector being used to determine whether to inject fuel based on the pressure within the sealed chamber; The controller is electrically connected to both the injector and the flow control valve, and is used to control the operating state of the injector and the opening degree of the flow control valve.

7. The test system for the flow control valve according to claim 2 or 3, characterized in that, The test system for the flow control valve further includes a display module, which is electrically connected to the processing module, and is used to display that the flow control valve under test is qualified when the flow characteristics of the flow control valve under test meet the standard.

8. A control method for a test system of a flow control valve, applied to the test system of the flow control valve as described in any one of claims 1-7, characterized in that, The method includes: The fuel supply module is controlled to supply fuel at a preset pressure to the flow control valve; The flow rate at the outlet of the flow control valve is obtained as measured by the flow sensor. The pressure inside the sealed cavity is obtained by the pressure sensor. The characteristics of the flow control valve are determined based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor. The step of determining the characteristics of the flow control valve based on the flow rate measured by the flow sensor and the pressure measured by the pressure sensor includes: When the first flow rate is less than the upper limit of the measurement range of the flow sensor, a first flow rate curve is determined based on the first flow rate within a set time period, wherein the first flow rate curve serves as the flow characteristic of the flow control valve when fuel is injected at the preset pressure. When the first flow rate reaches the upper limit of the measurement range of the flow sensor, the actual pressure curve is determined based on the pressure measured by the pressure sensor within a set time period, and the second flow curve is determined based on the actual pressure curve. The actual pressure curve serves as the pressure characteristic of the flow control valve when fuel is injected at the preset pressure, and the second flow curve serves as the flow characteristic of the flow control valve when fuel is injected at the preset pressure.

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