Engine solenoid valve acceptance inspection and electrical performance measurement device, debugging system and method

Abstract

The invention provides an engine solenoid valve acceptance and electrical performance measurement device, a debugging system and a debugging method, relates to a solenoid valve acceptance and electrical performance measurement device and a debugging method, and aims to solve the technical problems that an existing device is inconvenient to carry and low in working efficiency, and an existing engine solenoid valve acceptance and measurement method is low in automation degree and the like. According to the invention, the electromagnetic valve resistance value and the electrical performance of the attitude control engine product are rapidly measured through the engine electromagnetic valve acceptance check and electrical performance measurement device, the measurement result is directly transmitted to the background main control computer through a network, and the background main control computer calculates and automatically adjusts the background power supply voltage through a formula. And the terminal voltage of the solenoid valve meets test requirements. According to the method, the measured resistance value and terminal voltage value are automatically transmitted and adjusted, the working process is effectively simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to a solenoid valve acceptance and electrical performance measuring device and a debugging method, in particular to an engine solenoid valve acceptance and electrical performance measuring device, a debugging system and a method. Background Art

[0002] As my country's attitude control engine models continue to innovate, the number and types of test tasks are also increasing. Figure 1 As shown in the figure, in the test process of the automatic control engine, after the attitude control engine product is installed on the control console, the staff at the control post need to complete the resistance acceptance and terminal voltage measurement of the engine solenoid valve. Although the original resistance acceptance and terminal voltage measurement tools of the attitude control engine solenoid valve can basically meet the work requirements, their structure is very simple, such as Figure 2 As shown in the figure, four types of connectors and alligator clips are connected by bare wires, which is not convenient to carry. According to the different models of product solenoid valves, the plug of the connector is replaced to connect with different products. Not only is the wiring cumbersome, but the wiring needs to be plugged and unplugged many times, which is destructive to the product solenoid valve. When the tool is accepted, the three-meter and the solenoid valve under test need to be connected once. When measuring the terminal voltage, the three-meter and the solenoid valve under test need to be connected again. After the measurement is completed, all the wires need to be unplugged and the solenoid valve needs to be connected separately. For attitude control engine products with more solenoid valves, the wiring process is cumbersome. In the original attitude control engine solenoid valve acceptance and electrical performance measurement and debugging process, after obtaining the measurement results, data transmission and calculation need to be carried out by manpower. The original attitude control engine solenoid valve acceptance and electrical performance test process has problems such as inconvenient to carry tools, low work efficiency, and low degree of automation. In order to complete the test tasks efficiently and quickly in a short time with guaranteed quality and quantity, it is particularly important to optimize the work process and improve work efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems that the existing devices are inconvenient to carry, have low working efficiency, and have a cumbersome wiring process, and require repeated plugging and unplugging, as well as the low degree of automation of the existing attitude control engine solenoid valve acceptance and measurement methods. An engine solenoid valve acceptance and electrical performance measurement device, debugging system and method are proposed.

[0004] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] Engine solenoid valve acceptance and electrical performance measurement device, including power supply module, measurement module, selection module, and interface module;

[0006] The power supply module includes a battery and a power switch, and the power switch is connected to the positive electrode of the battery;

[0007] The selection module includes a three-speed rotary switch, one end of which is connected to the power switch, the first-speed port of the other end is used as a resistance gear, the second-speed port is used as a shutdown gear, and the third-speed port is used as a voltage gear;

[0008] The measuring module includes an ohmmeter and a voltmeter, the positive pole of the ohmmeter power port is connected to the resistance position of the three-position rotary switch, the positive pole of the voltmeter power port is connected to the voltage position of the three-position rotary switch, and the negative pole of the ohmmeter power port and the negative pole of the voltmeter power port are both connected to the negative pole of the battery to form a power supply circuit;

[0009] The interface module includes an input port and an output port. The signal end of the ohmmeter is connected to the engine solenoid valve through the input port to form a resistance measurement loop; the signal end of the voltmeter is connected to the engine control system channel through the output port to form a voltage measurement loop. By designing the appearance and internal circuit of the device, the power supply module, measurement module, selection module, and interface module are integrated and installed on the box body, which not only ensures the availability, safety and reliability of the device, but also takes into account the beauty and portability of the product. The engine solenoid valve acceptance and electrical performance measurement device can measure the resistance and voltage of two solenoid valves at one time, which can effectively reduce the workload of personnel in completing resistance acceptance and terminal voltage measurement and debugging, and shorten the working time by at least half.

[0010] Furthermore, the interface module includes two groups of connectors, each group of connectors includes a socket and a plug, wherein the socket is used as an input port and the plug is used as an output port. There are two input ports and two output ports, and the resistance and voltage of two solenoid valves can be measured at one time.

[0011] Furthermore, it also includes a box body. In order to facilitate the observation of the measured voltage value and resistance value, the ohmmeter head, voltmeter head, power switch and three-speed knob switch are arranged on the upper surface of the box body, the battery charging port is arranged on the lower surface of the box body, the ohmmeter and voltmeter are installed inside the box body, and the input port and output port are respectively installed on two opposite sides of the box body.

[0012] Furthermore, the input port model of the interface module is HY27G-1407ZK, and the output port model is HY27G-1407TJ; the connector is clamped on the box body through a square connector, and the four top corners of the square connector are fixedly connected to the box body by screws; the battery is a rechargeable battery.

[0013] Engine solenoid valve acceptance and electrical performance debugging system, including engine solenoid valve acceptance and electrical performance measurement device, front-end switch and back-end main control computer;

[0014] The engine solenoid valve acceptance and electrical performance measurement device transmits the measured data to the backstage main control computer through the frontstage switch.

[0015] Furthermore, the engine solenoid valve acceptance and electrical performance measurement device uses HTTP protocol to communicate with the background main control computer.

[0016] The engine solenoid valve acceptance and electrical performance debugging method is based on the engine solenoid valve acceptance and electrical performance debugging system, including the following steps:

[0017] 1) Use the engine solenoid valve acceptance and electrical performance measurement device to measure the resistance of the engine solenoid valve to obtain the resistance R of the solenoid valve, and complete the acceptance of the solenoid valve resistance;

[0018] 2) Using the engine solenoid valve acceptance and electrical performance measurement device to measure the voltage of the engine control system channel to obtain the terminal voltage U1 of the solenoid valve;

[0019] 3) The resistance R obtained in step 1 and the terminal voltage U1 obtained in step 2 are transmitted to the background main control computer of the engine solenoid valve acceptance and electrical performance debugging system;

[0020] 4) The background main control computer verifies the terminal voltage U1. If it meets the acceptance requirements, the measurement ends. If it does not meet the requirements, proceed to steps 5 and 6.

[0021] 5) Based on the resistance R obtained in step 1, the voltage U is calculated according to the following formula. The background main control computer automatically modulates the power supply voltage of the engine control system channel to the voltage U according to the calculation result:

[0022] U=U0(R0+R) / R;

[0023] Among them, U0 is the solenoid valve terminal voltage required for acceptance, and R0 is the line resistance from the background main control computer to the ohmmeter signal terminal;

[0024] 6) After the power supply voltage is adjusted, repeat steps 2 to 4 and check the terminal voltage U1 again until it meets the acceptance requirements. The resistance and electrical performance of the product solenoid valve of the attitude control engine are quickly measured through the engine solenoid valve acceptance and electrical performance measurement device, and the measurement results are directly transmitted to the background main control computer through the network. The background main control computer automatically adjusts the power supply voltage through formula calculation until the terminal voltage of the solenoid valve meets the verification requirements. This method automatically transmits and adjusts the measured terminal voltage value, effectively simplifying the work process and improving work efficiency.

[0025] Furthermore, the step 1 comprises the following steps:

[0026] 1.1) Use the product cable to connect the engine solenoid valve to the input port;

[0027] 1.2) Turn on the power switch and turn the three-position knob switch to the resistance position;

[0028] 1.3) Read the resistance R of the solenoid valve and complete the acceptance of the resistance of the solenoid valve;

[0029] 1.4) Turn the three-position rotary switch to the off position and turn off the power supply switch.

[0030] Furthermore, the step 2 comprises the following steps:

[0031] 2.1) Connect the external line of the engine control system channel to the output port;

[0032] 2.2) Turn on the power switch and turn the three-position knob switch to the voltage position, and at the same time, the engine control system channel is powered on;

[0033] 2.3) Read the terminal voltage U1 of the solenoid valve;

[0034] 2.4) Turn the three-position rotary switch to the off position and turn off the power supply switch.

[0035] Furthermore, the step of checking the terminal voltage U1 in step 4 is specifically to determine whether the terminal voltage U1 of the solenoid valve meets the requirement according to the following formula:

[0036] |U1-U0|≤A,

[0037] Among them, A is the required range of terminal voltage for different models of products in the engine.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention integrates the equipment for resistance acceptance and terminal voltage measurement into a box body by improving the circuit structure and the connection method between the device and the product, adopts a three-speed knob switch to realize the switching of resistance measurement and voltage measurement, optimizes the work flow of resistance acceptance and terminal voltage measurement, simplifies the wiring process, improves work efficiency, and has the function of simultaneously measuring the resistance and terminal voltage of the engine solenoid valve.

[0040] 2. The present invention transmits the measured data to the background main control computer through the front-end switch. The background main control computer automatically judges and adjusts the terminal voltage according to the algorithm, realizes the functions of data feedback and automatic calculation of the power supply voltage, which not only greatly improves the work efficiency of resistance acceptance and terminal voltage measurement and debugging, effectively simplifies the work process, improves the process automation, but also ensures the accuracy of the measurement results and adjustment results, and improves the reliability of the data.

[0041] 3. The present invention integrates an ohmmeter and a voltmeter into one box, thereby reducing the tools that personnel need to carry during resistance acceptance and terminal voltage measurement. The device of the present invention is light and concise, easy to carry, meets the requirements for on-site acceptance, and can efficiently complete the requirements for product resistance acceptance and terminal voltage measurement in one go.

[0042] 4. The connector model used in the present invention is HY27G-1407, which is compatible with various types of product cables and has good versatility for attitude control engine solenoid valves of different specifications and models, thereby improving the availability of the device. One end of the product cable is HY27G-1407TJ, which is connected to the HY27G-1407ZK of the input port of the measuring device, and the other end of the product cable is connected to the product solenoid valve. From acceptance and measurement to the end of the experiment, the process of plugging and unplugging the cable is carried out at the HY27G-1407TJ interface end of the product cable. The product cable and the product solenoid valve are connected once, and no plugging and unplugging operations are required during the experiment. Therefore, it has a good protection effect on the product solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is the system composition and working principle diagram of the resistance acceptance and terminal voltage measurement process in the background technology;

[0044] Figure 2 It is a structural schematic diagram of a resistance acceptance and terminal voltage measurement tool in the background technology;

[0045] Figure 3 A circuit diagram of an embodiment of the engine solenoid valve acceptance and electrical performance measurement device of the present invention;

[0046] Figure 4 It is a structural schematic diagram of an embodiment of the engine solenoid valve acceptance and electrical performance measurement device of the present invention;

[0047] Figure 5 A schematic diagram of the structure of a square connector of an embodiment of the engine solenoid valve acceptance and electrical performance measurement device of the present invention;

[0048] Figure 6 The present invention is a flow chart of an embodiment of the engine solenoid valve acceptance and electrical performance debugging method.

[0049] Description of reference numerals:

[0050] 1-Box body; 2-Ohmmeter head; 3-Voltmeter head; 4-Three-speed knob switch; 5-Input port; 6-Output port; 7-Power switch. DETAILED DESCRIPTION

[0051] The technical solution of the present invention will be further described below in conjunction with the embodiments and drawings of the present invention.

[0052] The engine solenoid valve acceptance and electrical performance measurement device includes a power supply module, a measurement module, a display module, a selection module, an interface module and a box body 1, such as Figure 3 As shown. The power supply module consists of a battery and a power switch 7. The battery is a 12V DC battery, and a rechargeable battery with a built-in power display module is selected. The battery is installed inside the box body 1 to power other electronic components of the device. The charging port is located on the lower surface of the box body 1. The power switch 7 is a self-locking luminous switch with a size of Φ16, which is used to control the power supply conduction of the entire circuit. One end of the power switch 7 is connected to the positive pole of the rechargeable battery, and the other end is connected to the three-speed knob switch 4 of the selection module.

[0053] The three-position rotary switch 4 is used as a signal selection switch, wherein the first position is the resistance position, which is connected in series with the positive pole of the ohmmeter power port; the second position of the three-position rotary switch 4 is used as the off position; the third position of the three-position rotary switch 4 is the voltage position, which is connected in series with the positive pole of the voltmeter power port; the ohmmeter and the voltmeter are connected in parallel to form a measurement module, and the negative pole of the ohmmeter power port and the negative pole of the voltmeter power port are both connected to the negative pole of the rechargeable battery to form a power supply circuit. The ohmmeter has a range of 200Ω, an accuracy of 0.5%, and a working power supply of 5VDC. Figure 4 As shown, the ohmmeter is embedded in the box body 1, and the ohmmeter head 2 is placed on the upper surface of the box body 1 as a resistance display screen, which is convenient for observing the measured resistance value. The power switch 7 is also installed on the upper surface of the box body 1, located below the ohmmeter head 2. The range of the voltmeter is 200V, the accuracy is 0.5%, and the working voltage is 5VDC. The voltmeter is embedded in the box body 1, and the voltmeter head 2 is placed on the surface of the box body 1 as a voltage display screen, which is convenient for observing the measured voltage value. The 12V rechargeable battery provides the voltage required for parallel voltage division for the parallel ohmmeter and voltmeter. The three-speed knob switch 4 is installed on the surface of the box body 1.

[0054] One end of the solenoid valve product cable is connected to the input port 5, and the other end is connected to the solenoid valve to connect the solenoid valve to the circuit. The positive pole of the ohmmeter signal port is connected to the positive pole of the product solenoid valve, and the negative pole of the ohmmeter signal port is connected to the negative pole of the product solenoid valve, forming a resistance measurement circuit for inspecting the resistance of the solenoid valve. The external line of the attitude control engine control system channel is connected to the output port 6, and the control system channel is connected to the circuit to realize the background control function of the product solenoid valve. The positive pole of the voltmeter signal port is connected to the positive pole of the product solenoid valve, the negative pole of the product solenoid valve is connected to the positive pole of the control system channel, and the negative pole of the control system channel is connected to the negative pole of the voltmeter signal port, forming a terminal voltage measurement circuit for measuring the terminal voltage of the solenoid valve.

[0055] The interface module includes two groups of connectors, each group of connectors includes a socket and a plug. The socket is used as the input port 5, and the model used is HY27G-1407ZK; the plug is used as the output port 6, and the model used is HY27G-1407TJ. The HY27G-1407TJ connector cannot be connected by flange and is difficult to be fixed on the surface of the box body 1. Figure 5 As shown, the device uses a square connector instead of a flange. The square connector is clamped between the HY27G-1407TJ connector and the box body 1 of the device, and is fixedly connected at the four top corners of the square connector by nuts. Two socket connectors are installed on the top of the box body 1 as input port 5, and the other two plug connectors are installed on the bottom of the box body 1 as output port 6. There are two input ports 5 and two output ports 6, and the resistance and voltage of two solenoid valves can be measured at one time. The model of the solenoid valve product cable and the input port 5 connection end is HY27G-1407TJ, and the model of the external line of the attitude control engine control system channel and the output port 6 connection end is HY27G-1407ZK. After the measurement is completed, the product cable and the external line are pulled out from the input port 5 and the output port 6 respectively, and the external line is connected to the product cable, and the product solenoid valve is connected to the control system to complete the control of the solenoid valve by the control system.

[0056] The present invention installs a connector, a voltmeter, an ohmmeter, a power supply module, and a selection module compatible with multiple models of products on the engine solenoid valve acceptance and electrical performance measurement device. The device has the function of measuring the solenoid valve resistance and terminal voltage at the same time, meeting the requirements of completing the solenoid valve resistance acceptance and terminal voltage measurement work on-site and in one go. Not only does it improve work efficiency, but the device itself has a simple structure and is easy to carry.

[0057] The engine solenoid valve acceptance and electrical performance debugging system includes an engine solenoid valve acceptance and electrical performance measuring device, a front-end switch and a back-end main control computer. The engine solenoid valve acceptance and electrical performance measuring device is connected to the RJ45 network port of the front-end switch as an acquisition terminal. The front-end switch transmits the device measurement resistance R and terminal voltage U1 to the back-end main control computer. The engine solenoid valve acceptance and electrical performance measuring device uses the HTTP protocol to communicate with the back-end main control computer to realize the functions of data feedback and automatic calculation of the back-end power supply voltage.

[0058] Engine solenoid valve acceptance and electrical performance debugging method, the process is as follows Figure 6 As shown, the specific steps include:

[0059] 1) Use the engine solenoid valve acceptance and electrical performance measurement device to measure the resistance of the attitude control engine solenoid valve, obtain the resistance R of the solenoid valve, and complete the acceptance of the solenoid valve resistance;

[0060] 1.1) Use the product cable to connect the attitude control engine solenoid valve to input port 5 and lock the connector of input port 5;

[0061] 1.2) Turn on the power switch 7 and turn the three-speed knob switch 4 to the resistance position;

[0062] 1.3) Read the resistance R of the solenoid valve and complete the acceptance of the resistance of the solenoid valve;

[0063] 1.4) Turn the three-speed rotary switch 4 to the off position and turn off the power switch 7.

[0064] 2) Use the engine solenoid valve acceptance and electrical performance measurement device to measure the voltage of the attitude control engine control system channel to obtain the terminal voltage U1 of the solenoid valve;

[0065] 2.1) Connect the external line of the engine control system channel to the output port 6 and lock the connector of the output port 6;

[0066] 2.2) Turn on the power switch 7, and turn the three-speed knob switch 4 to the voltage position, and at the same time, the engine control system channel is powered on;

[0067] 2.3) Read the terminal voltage U1 of the solenoid valve;

[0068] 2.4) Turn the three-speed rotary switch 4 to the off position and turn off the power switch 7.

[0069] 3) Transmit the resistance R in step 1.3 and the terminal voltage U1 in step 2.3 to the background main control computer of the engine solenoid valve acceptance and electrical performance debugging system;

[0070] 4) Check the terminal voltage U1 in the background, and judge whether the difference between the terminal voltage U1 of the solenoid valve and the voltage U0 required by the test task meets the range value A according to the following formula:

[0071] |U1-U0|≤A,

[0072] Wherein, A is the required range of terminal voltage for different models of engines. In this embodiment, A is 3V. If the difference is less than 3V, it is confirmed that the attitude control generator solenoid valve meets the verification requirements and the measurement ends; if the difference is greater than 3V, proceed to step 5;

[0073] 5) Based on the resistance R obtained in step 1, the voltage U is calculated according to the following formula. The background main control computer automatically adjusts the power supply voltage of the engine control system channel to the voltage U according to the calculation result:

[0074] U=U0(R0+R) / R,

[0075] Where U0 is the terminal voltage required by the test task, in this embodiment, U0 = 28V, R0 is the line resistance from the background main control computer to the ohmmeter, in this embodiment, R0 = 5Ω. Different models of attitude control engine products require different terminal voltages U1. The background power supply voltage is used as the total voltage, and the terminal voltage U1 of the solenoid valve is the partial voltage. If the terminal voltage U0 required by the test task is known, the value of the background power supply voltage corresponding to the terminal voltage U1 that meets the requirements can be calculated according to Ohm's law.

[0076] 6) After the power supply voltage is adjusted, return to step 2.2 to remeasure the terminal voltage U1. However, since the ambient temperature of the test task has a certain degree of influence on the resistance of the solenoid valve, it is necessary to repeat steps 3 and 4 to calibrate the terminal voltage U1 again to ensure that the terminal voltage U1 meets the calibration requirements at this time.

[0077] The present invention uses an integrated engine solenoid valve acceptance and electrical performance measurement device to quickly measure the resistance and electrical performance of the attitude control engine solenoid valve, and directly transmits the measurement results to the background through the network. The background computer automatically adjusts the power supply voltage through formula calculation to meet the test requirements. The measurement and debugging device and method of the present invention can be used for multiple models of products. The engine solenoid valve acceptance and electrical performance debugging method has been put into use in multiple single- and dual-component ground and high-mode tests. The development of the present invention effectively simplifies the resistance acceptance and terminal voltage measurement and debugging process of the attitude control engine control system by job personnel, thereby simplifying the work process and improving work efficiency.

Claims

1. Engine solenoid valve acceptance and electrical performance measurement device, characterized by: Including power supply module, measurement module, selection module and interface module; The power supply module comprises a battery and a power switch (7), and the power switch (7) is connected to the positive electrode of the battery; The selection module comprises a three-speed rotary switch (4), one end of which is connected to a power supply switch (7), a first-speed port at the other end of which is used as a resistance gear, a second-speed port as an off gear, and a third-speed port as a voltage gear; The measuring module comprises an ohmmeter and a voltmeter, the positive pole of the ohmmeter power supply port is connected to the resistance position of the three-position rotary switch (4), the positive pole of the voltmeter power supply port is connected to the voltage position of the three-position rotary switch (4), and the negative pole of the ohmmeter power supply port and the negative pole of the voltmeter power supply port are both connected to the negative pole of the battery to form a power supply circuit; The interface module comprises an input port (5) and an output port (6); the signal end of the ohmmeter is connected to the engine solenoid valve via the input port (5) to form a resistance measurement loop; the signal end of the voltmeter is connected to the engine control system channel via the output port (6) to form a voltage measurement loop.

2. The engine solenoid valve acceptance and electrical performance measurement device according to claim 1, characterized in that: The interface module comprises two groups of connectors, each group of connectors comprises a socket and a plug, wherein the socket serves as an input port (5) and the plug serves as an output port (6).

3. The engine solenoid valve acceptance and electrical performance measurement device according to claim 1 or 2, characterized in that: It also comprises a box body (1), the ohmmeter head (2), the voltmeter head (3), the power switch (7) and the three-speed knob switch (4) are arranged on the upper surface of the box body (1), the battery charging port is arranged on the lower surface of the box body (1), the ohmmeter and the voltmeter are installed inside the box body (1), and the input port (5) and the output port (6) are respectively installed on two opposite side surfaces of the box body (1).

4. The engine solenoid valve acceptance and electrical performance measurement device according to claim 3 is characterized in that: The model of the input port (5) of the interface module is HY27G-1407ZK, and the model of the output port (6) is HY27G-1407TJ; the connector is clamped on the box body (1) through a square connector, and the four top corners of the square connector are fixedly connected to the box body (1) by screws; The battery is a rechargeable battery.

5. Engine solenoid valve acceptance and electrical performance debugging system, characterized by: It comprises the engine solenoid valve acceptance and electrical performance measurement device as described in any one of claims 1 to 4, a front-end switch and a back-end main control computer; The engine solenoid valve acceptance and electrical performance measurement device transmits the measured data to the backstage main control computer through the frontstage switch.

6. The engine solenoid valve acceptance and electrical performance debugging system according to claim 5 is characterized in that: The engine solenoid valve acceptance and electrical performance measurement device uses HTTP protocol to communicate with the background main control computer.

7. The engine solenoid valve acceptance and electrical performance debugging method is based on the engine solenoid valve acceptance and electrical performance debugging system according to claim 5 or 6, characterized in that: The following steps are involved: 1) Use the engine solenoid valve acceptance and electrical performance measurement device to measure the resistance of the engine solenoid valve to obtain the resistance R of the solenoid valve, and complete the acceptance of the solenoid valve resistance; 2) Using the engine solenoid valve acceptance and electrical performance measurement device to measure the voltage of the engine control system channel to obtain the terminal voltage U1 of the solenoid valve; 3) The resistance R obtained in step 1 and the terminal voltage U1 obtained in step 2 are transmitted to the background main control computer of the engine solenoid valve acceptance and electrical performance debugging system; 4) The background main control computer verifies the terminal voltage U1. If it meets the acceptance requirements, the measurement ends. If it does not meet the requirements, proceed to steps 5 and 6. 5) Based on the resistance R obtained in step 1, the voltage U is calculated according to the following formula. The background main control computer automatically adjusts the power supply voltage of the engine control system channel to the voltage U according to the calculation result: U=U0(R0+R) / R; Among them, U0 is the solenoid valve terminal voltage required for acceptance, and R0 is the line resistance from the background main control computer to the ohmmeter signal terminal; 6) After the supply voltage is adjusted, repeat steps 2 to 4 and check the terminal voltage U1 again until it meets the acceptance requirements.

8. The engine solenoid valve acceptance and electrical performance debugging method according to claim 7 is characterized in that: The step 1 comprises the following steps: 1.1) Connect the engine solenoid valve to the input port (5) using the product cable; 1.2) Turn on the power switch (7) and turn the three-position rotary switch (4) to the resistance position; 1.3) Read the resistance R of the solenoid valve and complete the acceptance of the resistance of the solenoid valve; 1.4) Turn the three-position rotary switch (4) to the off position and turn off the power switch (7).

9. The method for acceptance and electrical performance debugging of an engine solenoid valve according to claim 7, characterized in that: The step 2 comprises the following steps: 2.1) Connect the external line of the engine control system channel to the output port (6); 2.2) Turn on the power switch (7) and turn the three-speed rotary switch (4) to the voltage position, and at the same time, the engine control system channel is powered on; 2.3) Read the terminal voltage U1 of the solenoid valve; 2.4) Turn the three-position rotary switch (4) to the off position and turn off the power switch (7).

10. The engine solenoid valve acceptance and electrical performance debugging method according to claim 7, characterized in that: The step 4 of checking the terminal voltage U1 is specifically to determine whether the terminal voltage U1 of the solenoid valve meets the requirements according to the following formula: |U1-U0|≤A, Among them, A is the required range of terminal voltage for different models of products in the engine.

Images