System, method, equipment and medium for automatically detecting performance of fuel injection solenoid valve

Abstract

The invention provides a method for automatically detecting the performance of a fuel injection solenoid valve, and the method comprises a detection support module which comprises a pedestal and is used for bearing and fixing to guarantee the stable connection between parts during measurement; the gap adjusting module comprises a motor, a coupler, a speed reducer, a ball screw pair and a gapless displacement table and is used for adjusting the gap between the armature and the electromagnetic valve; the electromagnetic force measuring module comprises a dial indicator and a force measuring sensor and is used for collecting values of the force measuring sensor, values of the dial indicator and values of output current; the lower computer module comprises a motor driving unit, an electromagnetic valve driving unit and a communication unit and is used for receiving data of the gap adjusting module, the electromagnetic force measuring module and the upper computer and feeding back the data to the upper computer; and the upper computer module is used for generating a test case, issuing the test case to the lower computer module and receiving data fed back by the lower computer module. According to the invention, the detection efficiency of the fuel injection solenoid valve is improved, a special drive circuit is not needed, and the test cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of fuel injection solenoid valves, and specifically to an automatic performance testing system, method, equipment, and medium for fuel injection solenoid valves. Background Technology

[0002] With the upgrading of international and domestic emission regulations, new and green fuel engine technologies have developed rapidly worldwide. As the core component of fuel injection control, the fuel injection solenoid valve receives drive commands from the ECU controller to control the timing and amount of fuel injection, which directly affects the engine's power and emissions. As a result, its demand is also increasing. Therefore, it is urgent to develop and manufacture solenoid valves suitable for engines with different fuel types.

[0003] Fuel injection solenoid valves differ from general-purpose solenoid valves in automation control. Their operating cycle (from opening to closing) is typically between 1 and 5 milliseconds, with a response speed in the microsecond range, while ordinary solenoid valves generally have a response speed of tens of milliseconds. Fuel injection solenoid valves are more complex to drive than general-purpose solenoid valves in automation control, requiring a dedicated drive circuit: a high current is rapidly applied to the coil to generate an attractive force that pulls the armature, opening the valve core to allow fuel to pass through; then, a lower current is used to maintain the attractive force, keeping the valve open; finally, the current is quickly cut off to cut off the fuel supply. The current driving method, magnitude, timing, and armature gap all directly affect the performance of the solenoid valve, as well as the selection of components and power consumption in the control circuit, and ultimately, the engine's control strategy.

[0004] Therefore, there is currently a lack of means to accurately test the performance of solenoid valves in fuel injection engines. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides an automatic performance testing system, method, equipment and medium for fuel injection solenoid valves, so as to solve the technical problem that there is no means to accurately test the performance of fuel injection solenoid valves in the prior art.

[0006] This invention provides an automatic performance testing system for fuel injection solenoid valves, comprising:

[0007] The detection support module includes a base for supporting and fixing components to ensure stable connections during measurement.

[0008] The clearance adjustment module, including a motor, coupling, reducer, ball screw pair and clearance-free displacement stage, is used to adjust the clearance between the armature and the solenoid valve.

[0009] The electromagnetic force measurement module includes a dial indicator and a force sensor, used to collect the values ​​from the force sensor, the dial indicator, and the output current.

[0010] The lower-level module includes a motor drive unit, a solenoid valve drive unit, and a communication unit, which are used to receive data from the gap adjustment module, the electromagnetic force measurement module, and the upper-level computer, and to feed it back to the upper-level computer.

[0011] The host computer module is used to generate test cases and send them to the slave computer module, and to receive data from the slave computer module.

[0012] This invention also provides an automatic detection method for the performance of a fuel injection solenoid valve, comprising:

[0013] S1. Install and fix the solenoid valve to be tested onto the test support module;

[0014] S2. Power on the lower-level module and perform initialization; then power on the upper-level module, initialize it, and establish a communication connection between the upper-level module and the lower-level module.

[0015] S3. Set test parameters in the host computer module, input the magnitude and time of the drive opening current Open and the holding current hold, and input the maximum and minimum gap and step distance between the armature and the solenoid valve. Generate the first test case based on the gap and step distance between the armature and the solenoid valve, and combine the first test case with the magnitude and time of the opening current Open and the holding current hold to generate different second test cases.

[0016] S4. The host computer module sends a zero-gap reset operation to the slave computer module.

[0017] S5. After the reset operation, the host computer module sends any second test case to the slave computer module. The slave computer module completes the test according to the second test case and records the collected values.

[0018] S6. Repeat step S5 until all second test cases are completed, draw a diagram showing the relationship between electromagnetic force, current, and gap, and end the test.

[0019] Optionally, the step of mounting and fixing the solenoid valve to be tested to the testing support module includes:

[0020] The solenoid valve is mounted on the base and locked, the corresponding armature is mounted on one side of the force sensor and locked, and the solenoid valve is connected to the solenoid valve drive unit.

[0021] Optionally, the host computer module sends a zero-gap reset operation to the slave computer module, including:

[0022] After receiving the zero-gap reset operation command, the lower-level module controls the motor drive unit to drive the motor to rotate in the forward direction. The gap adjustment module drives the armature to approach the electromagnet until the force sensor reads a value that changes from 0 to a positive value, at which point the motor is locked and the dial indicator is set to zero.

[0023] Optionally, after the reset operation, the host computer module sends any second test case to the slave computer module, and the slave computer module completes the test according to the second test case and records the collected values, including:

[0024] S501, The host computer module sends any second test case to the slave computer module;

[0025] S502, the lower-level module drives the motor drive unit to realize the reverse rotation of the motor. The gap adjustment module drives the armature away from the solenoid valve until the dial indicator reads the value to the set value, and then immediately locks the motor.

[0026] S503, the lower-level computer module drives the solenoid valve drive unit to realize the opening and closing of the solenoid valve, and records the values ​​of current and force when opening and closing, and feeds back the recorded values ​​to the upper-level computer module.

[0027] The present invention also provides an electronic device, which includes a processor, a storage medium and a computer program, wherein the computer program is stored in the storage medium, and is characterized in that the computer program, when executed by the processor, implements the aforementioned automatic detection method for the performance of the fuel injection solenoid valve.

[0028] The present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the aforementioned automatic detection method for the performance of a fuel injection solenoid valve.

[0029] Compared with the prior art, the present invention:

[0030] Based on the support module, gap adjustment module, electromagnetic force measurement module, lower computer module, and upper computer module, data acquisition of the fuel injection solenoid valve is realized, and the relationship diagram between electromagnetic force, current, and gap is plotted, which improves the detection efficiency of the fuel injection solenoid valve. At the same time, it eliminates the need for a dedicated drive circuit, reducing testing costs. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the system structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the fuel injection solenoid valve of the present invention;

[0035] Figure 3 This is a schematic diagram of the typical structure and drive current waveform of the fuel injection solenoid valve of the present invention;

[0036] Figure 4 This is a schematic diagram of the method of the present invention;

[0037] Figure 5 This is a schematic diagram illustrating the operation of the host computer module in this invention;

[0038] Figure 6 This is a schematic diagram illustrating the relationship between electromagnetic force, current, and time in this invention.

[0039] Figure 7 This is a schematic diagram of the electromagnetic force-current relationship in this invention;

[0040] Figure 8 This is a schematic diagram of the electromagnetic force-air gap relationship in this invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Silicon steel patch; 2. Copper conductor coil; 3. Armature; 4. Electromagnet body; 5. Metal base; 6. Motor; 7. Reducer; 8. Lead screw pair; 9. Dial indicator; 10. Displacement stage; 11. Pressure sensor. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other implementation cases obtained by those skilled in the art without creative effort are within the scope of protection of this application. Functional units with the same reference numerals in the examples of this invention have the same and similar structures and functions.

[0044] See Figure 1 This invention provides an automatic performance testing system for fuel injection solenoid valves, comprising:

[0045] The detection support module includes a base for supporting and fixing components to ensure stable connections during measurement.

[0046] The clearance adjustment module includes a motor 6, a coupling, a reducer 7, a ball screw pair 8, and a clearance-free displacement stage 10, which is used to adjust the clearance between the armature 3 and the solenoid valve.

[0047] The electromagnetic force measurement module includes a dial indicator 9 and a force sensor, which are used to collect the values ​​of the force sensor, the dial indicator 9, and the output current.

[0048] The lower-level module includes a motor 6 drive unit, a solenoid valve drive unit, and a communication unit, which are used to receive data from the gap adjustment module, the electromagnetic force measurement module, and the upper-level computer, and feed it back to the upper-level computer.

[0049] The host computer module is used to generate test cases and send them to the slave computer module, and to receive data from the slave computer module.

[0050] In this embodiment, see Figure 2 and Figure 3 The tested fuel injection solenoid valve is an open type, meaning that armature 3 is not connected to silicon steel patch 1, and the copper coil 2 is energized in the following way: Figure 3 The term "It" refers to the current-time parameter. During operation, a high voltage is initially applied to minimize the valve opening time (tPeak, less than 200 microseconds). When the current first reaches "Open," the PWM wave controls the drive circuit output to reduce the voltage, maintaining it until the average current "Peak," thus ensuring the solenoid valve opens stably. Once the solenoid valve is fully open, the voltage is further reduced to maintain the opening current "Hold," with the duration "tHold" determined based on the fuel injection volume. Finally, the drive circuit is shut off, thereby closing the solenoid valve. For details of the drive control method, please refer to the published invention CN113110397B [A High-Speed ​​Solenoid Valve Drive Circuit and Fault Diagnosis Circuit and Method]. The purpose of this drive method is to reduce the solenoid valve opening time with minimal power consumption, increase electromagnetic attraction, and thus reduce the requirements on the drive circuit. These three characteristic quantities directly reflect the performance of the solenoid valve and are also the parameters that need to be measured in this invention.

[0051] The detection support module is a metal base 5 that supports components such as the electromagnetic force measurement module, the gap adjustment module, and the solenoid valve clamp under test. Its function is to ensure that the connection of all components is stable and reliable when the detection system is working.

[0052] The gap adjustment module mainly consists of a motor 6, a coupling, a precision reducer 7, a precision ball screw pair 8, and a backlash-free displacement stage 10. The motor 6 is connected to the precision reducer 7 through the coupling, and the precision reducer 7 is directly connected to the precision ball screw. The backlash-free displacement stage 10 is connected to the ball screw through the screw pair. The left end of the force sensor is installed on the right end of the displacement stage 10, and the armature 3 pieces are installed on the right side of the force sensor. The motor 6 and the reducer 7 are directly fixed to the metal base 5. The precision ball screw is fixed to the metal base 5 through the screw pair. The dial indicator 9 probe is in close contact with the end face of the backlash-free displacement stage 10 without gap, and the indicator body is fixed on the metal base 5. The backlash-free displacement stage 10 is limited to sliding left and right by the screw pair.

[0053] Among them, the motor 6 can be a Buke DM542+1.8Nm two-phase hybrid motor 6 with a shaft diameter of 8mm, using 51200 steps / revolution, single pulse + direction control mode, and the drive is provided by the lower computer module, which is fixed on the metal base 5.

[0054] The precision reducer 7 can be a KRLONG cast iron worm gear reducer 7, model NMRV30, with an output shaft diameter of 12mm and a transmission ratio of 5. It is connected to the motor 6 via a JR-025 type plum blossom coupling and fixed on the metal base 5.

[0055] The precision ball screw assembly 8 can be model SFU1204, which is directly connected to the output shaft of the reducer 7, and its tail end is fixed to the metal base 5 through the screw assembly.

[0056] The metal base 5 is made of cast iron and is milled to fix the motor 6, reducer 7, lead screw pair and solenoid valve, etc.

[0057] The backlash-free displacement stage 10 is mounted on the metal base 5. Under the limit, it can only move left and right with the rotation of the lead screw, with a movement range of 0mm < movement range < 10mm. A threaded hole is provided at the center of one side end face of its top for installing a force sensor.

[0058] The electromagnetic force measurement module mainly consists of a dial indicator 9, a force sensor, and a solenoid valve under test. During operation, the controller drives the motor 6 to make the displacement stage 10 move linearly left and right to adjust the gap between the armature 3 and the solenoid valve. The gap is measured by the dial indicator 9. After the gap reaches the set value, the controller outputs current to the solenoid valve to generate electromagnetic force. Under the action of electromagnetic force, the armature 3 is pulled. The controller collects the value of the force sensor in real time and simultaneously collects and outputs the value of the current.

[0059] The dial indicator 9, model GL065, has a measuring range of 0-6.5mm and an accuracy of 0.001mm. It communicates with the lower-level computer module through the TIATSB-89-A-2006 interface. Its control signal S / RET and power supply are provided by the lower-level computer module. The indicator body is fixed on the base B, and the probe contacts the other end face of the displacement stage 10. Under the action of the displacement stage 10, the gap is measured.

[0060] The force sensor is a tension / compression sensor 11, model LANKEN LC0501 piezoelectric quartz force sensor, with a range of 5kN for compression and 1kN for tension, and a sensitivity of 4pC / N. It is controlled by a lower-level computer to collect its strain charge and convert it into force.

[0061] The lower-level module mainly consists of a motor 6 drive circuit (unit), a solenoid valve drive circuit (unit), a communication unit, and a single-chip microcomputer minimum system. Its function is to receive control data from the upper-level module, control the armature 3 gap adjustment module, drive the solenoid valve, collect sensor data, and feed the data back to the upper-level module.

[0062] The lower-level module can adopt an embedded control system based on the ARM microcontroller GD32F470 as the main control chip. The functional circuits mainly include the microcontroller minimum system, motor 6 drive circuit, solenoid valve drive circuit, CAN communication, serial communication modules, and other peripheral power supplies, digital I / O, analog AD and DA modules. Among them, the core circuit module solenoid valve drive circuit refers to the published invention patent CN106090383B [Gas Valve Drive Circuit], and the motor 6 drive circuit refers to the published invention patent CN105375840B [Closed-Loop Control Method Single-Pole Stepper Motor 6 Controller]. The rest are technologies known in the field and will not be described in detail here.

[0063] The host computer module's main functions include creating, editing, and saving measurement projects, setting parameters, starting and stopping measurements, and drawing charts. During measurement, a measurement project is first created and basic information is entered, or a previous project is opened. On the page, parameters such as current, time, and gap are edited and entered according to actual needs. The software automatically generates test cases. After starting the test, the software automatically sends the test case data to the slave computer module, waits for and receives the returned data, and finally draws the collected data into charts.

[0064] The host computer module can be a general-purpose laptop computer. The software of the host computer module is developed using C++. It mainly includes functions such as creating, editing, and saving measurement projects, setting parameters, starting and stopping measurements, and drawing charts. The software interface is as follows: Figure 5 As shown in the attached diagram. During measurement, the corresponding parameters are first set in the software interface; then the measurement is started, and the software establishes a connection with the lower-level module via the CAN communication network and exchanges data; after the lower-level module completes the measurement, it returns the data, which is then recorded and saved by the upper-level computer; finally, the software in the upper-level computer module plots the data into a chart, as shown in the attached diagram. Figure 5 As shown, this completes one measurement.

[0065] In addition, the fuel solenoid valve armature 3 and the electromagnet body 4 are fixed as a pair of components on the force sensor and the metal base 5, respectively.

[0066] See Figure 4 The present invention also provides an automatic detection method for the performance of a fuel injection solenoid valve, comprising:

[0067] S1. Install and fix the solenoid valve to be tested onto the test support module;

[0068] S2. Power on the lower-level module and perform initialization; then power on the upper-level module, initialize it, and establish a communication connection between the upper-level module and the lower-level module.

[0069] S3. Set test parameters in the host computer module, input the magnitude and time of the drive opening current Open and the holding current hold, and input the maximum and minimum gap and step distance between the armature 3 and the solenoid valve. Generate the first test case based on the gap and step distance between the armature 3 and the solenoid valve, and combine the first test case with the magnitude and time of the opening current Open and the holding current hold to generate different second test cases.

[0070] S4. The host computer module sends a zero-gap reset operation to the slave computer module.

[0071] S5. After the reset operation, the host computer module sends any second test case to the slave computer module. The slave computer module completes the test according to the second test case and records the collected values.

[0072] S6. Repeat step S5 until all second test cases are completed, draw a diagram showing the relationship between electromagnetic force, current, and gap, and end the test.

[0073] In this embodiment, S1, the solenoid valve to be tested is installed and fixed to the detection support module;

[0074] First, turn off the power to the experimental platform. After the power indicator light goes out, install the armature 3 and electromagnet 4 of the solenoid valve onto the force sensor and base respectively. Adjust the angle between the armature 3 and the electromagnet 4 so that the armature 3 is flush with the silicon steel patch 1, that is, the vertical projection of the armature 3 just coincides with the silicon steel patch 1. Lock it in place. After clamping and fastening, the coil terminal on the copper conductor coil 2 is securely connected to the drive cable provided by the lower computer module.

[0075] S2. Power on the lower-level module and perform initialization; then power on the upper-level module, and after initialization, establish a communication connection between the upper-level module and the lower-level module.

[0076] Turn on the host computer module, start the software, and power on the lower-level controller; connect the computer to the controller via a USB-CAN cable; after the software starts, select the lower-level module's ID as 1, and then click Connect Device. After that, the host computer module's software will automatically establish a connection with the lower-level module and remain online.

[0077] S3. Set test parameters in the host computer module, input the magnitude and time of the drive opening current Open and the holding current hold, and input the maximum and minimum gap and step distance between the armature 3 and the solenoid valve. Generate the first test case based on the gap and step distance between the armature 3 and the solenoid valve, and combine the first test case with the magnitude and time of the opening current Open and the holding current hold to generate different second test cases.

[0078] In the host computer module software, first click the "New Project" wizard, then "Add Connected Device", then select the project file save path and set the project name, and finally click "OK" to complete the creation of the new test project.

[0079] Next, click "Engineering" in the menu, select "Engineering Configuration" from the drop-down box, and set the solenoid valve opening current open to 48A, peak current to 40A, opening time tpeak to 200us, opening holding current hold to 16A, opening holding time thold to 2000us, minimum gap Gmin to 10um, maximum gap Gmax to 200um, and gap step value to 10um / step. Save the settings.

[0080] Furthermore, after completing the parameter settings, the host computer generates multiple test cases based on the armature 3 gap range and step spacing; each test case is then bound to different drive parameters to generate multiple sets of test cases, as shown in Table 1 below.

[0081] Table 1 Test Cases are Automatically Generated

[0082]

[0083] S4. The host computer module sends a zero-gap reset operation to the slave computer module.

[0084] At the start of the test, the operator presses "Start Test," and the host computer software issues a "Reset" command. Upon receiving the command, the slave computer enables the motor 6 drive, sets the rotation direction control to the set position (forward rotation), and simultaneously outputs a pulse signal at a frequency of 10kHz to control the drive bridge. The motor 6 rotates in the forward direction, and the displacement stage 10, driven by the transmission mechanism, causes the armature 3 to slowly approach the solenoid valve. During this process, the slave computer reads the force sensor values ​​in real time. When the calculated force value suddenly changes from 0 to a positive value, the motor 6 drive is immediately disabled, the pulse output is stopped, and the output signal is set to zero for the dial indicator 9. The slave computer then reports the completion of the reset operation to the host computer.

[0085] S5. After the reset operation, the host computer module sends any second test case to the slave computer module. The slave computer module completes the test according to the second test case and records the collected values.

[0086] Furthermore, after receiving the measurement parameters, the lower-level machine controls the drive motor 6 to rotate in the opposite direction, and through the gap adjustment module, it drives the armature 3 to slowly move away from the solenoid valve. During this process, the value of the dial indicator 9 is read in real time. When the value reaches the set value, the motor 6 is locked immediately to complete the gap adjustment operation.

[0087] Furthermore, the lower-level machine enables the drive circuit to open and close the solenoid valve according to the set current parameters. During this process, the magnitude of current and force is collected in real time and recorded in memory. When the drive is turned off for a period of time, sampling stops, thus completing one test.

[0088] Furthermore, after completing a test, the lower-level machine sends the data to the upper-level machine, which then stores the data on the hard drive.

[0089] S6. Repeat step S5 until all second test cases are completed, draw a diagram showing the relationship between electromagnetic force, current, and gap, and end the test.

[0090] Finally, draw a diagram showing the relationship between electromagnetic force, current, and gap (see...). Figure 6 - Figure 8 End the test, shut down the host computer and the slave computer, and disassemble the solenoid valve under test.

[0091] The present invention also provides an electronic device, which includes a processor, a storage medium and a computer program, wherein the computer program is stored in the storage medium, and is characterized in that the computer program, when executed by the processor, implements the aforementioned automatic detection method for the performance of the fuel injection solenoid valve.

[0092] The present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the aforementioned automatic detection method for the performance of a fuel injection solenoid valve.

[0093] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0094] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An automatic performance testing system for a fuel injection solenoid valve, characterized in that, include: The detection support module includes a base for supporting and fixing components to ensure stable connections during measurement. The clearance adjustment module, including a motor, coupling, reducer, ball screw pair and clearance-free displacement stage, is used to adjust the clearance between the armature and the solenoid valve. The electromagnetic force measurement module includes a dial indicator and a force sensor, used to collect the values ​​from the force sensor, the dial indicator, and the output current. The lower-level module includes a motor drive unit, a solenoid valve drive unit, and a communication unit, which are used to receive data from the gap adjustment module, the electromagnetic force measurement module, and the upper-level computer, and to feed it back to the upper-level computer. The host computer module is used to generate test cases and send them to the slave computer module, and to receive data from the slave computer module.

2. The method using the automatic performance detection system for the fuel injection solenoid valve as described in claim 1, characterized in that, include: S1. Install and fix the solenoid valve to be tested onto the test support module; S2. Power on the lower-level module and perform initialization; then power on the upper-level module, initialize it, and establish a communication connection between the upper-level module and the lower-level module. S3. Set test parameters in the host computer module, input the magnitude and time of the drive opening current Open and the holding current hold, and input the maximum and minimum gap and step distance between the armature and the solenoid valve. Generate the first test case based on the gap and step distance between the armature and the solenoid valve, and combine the first test case with the magnitude and time of the opening current Open and the holding current hold to generate different second test cases. S4. The host computer module sends a zero-gap reset operation to the slave computer module. S5. After the reset operation, the host computer module sends any second test case to the slave computer module. The slave computer module completes the test according to the second test case and records the collected values. S6. Repeat step S5 until all second test cases are completed, draw a diagram showing the relationship between electromagnetic force, current, and gap, and end the test.

3. The automatic performance testing method for fuel injection solenoid valve as described in claim 2, characterized in that, The process of installing and fixing the solenoid valve under test to the testing support module includes: The solenoid valve is mounted on the base and locked, the corresponding armature is mounted on one side of the force sensor and locked, and the solenoid valve is connected to the solenoid valve drive unit.

4. The automatic performance testing method for fuel injection solenoid valve as described in claim 2, characterized in that, The host computer module sends a zero-gap reset operation to the slave computer module, including: After receiving the zero-gap reset operation command, the lower-level module controls the motor drive unit to drive the motor to rotate in the forward direction. The gap adjustment module drives the armature to approach the electromagnet until the force sensor reads a value that changes from 0 to a positive value, at which point the motor is locked and the dial indicator is set to zero.

5. The automatic performance testing method for fuel injection solenoid valve as described in claim 2, characterized in that, After the reset operation, the host computer module sends any second test case to the slave computer module. The slave computer module completes the test according to the second test case and records the collected values, including: S501, The host computer module sends any second test case to the slave computer module; S502, the lower-level module drives the motor drive unit to realize the reverse rotation of the motor. The gap adjustment module drives the armature away from the solenoid valve until the dial indicator reads the value to the set value, and then immediately locks the motor. S503, the lower-level computer module drives the solenoid valve drive unit to realize the opening and closing of the solenoid valve, and records the values ​​of current and force when opening and closing, and feeds back the recorded values ​​to the upper-level computer module.

6. An electronic device comprising a processor, a storage medium, and a computer program, wherein the computer program is stored in the storage medium, characterized in that, When the computer program is executed by the processor, it implements the automatic performance detection method for the fuel injection solenoid valve as described in any one of claims 2 to 5.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the automatic performance detection method for the fuel injection solenoid valve as described in any one of claims 2 to 5.

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