Auxiliary devices used during the electromagnetic compatibility test of the ignition system

Abstract

The present application discloses an auxiliary device used in the electromagnetic compatibility test process of an ignition system, including: a simulated cylinder is set on the ground; an intake assembly is connected to the simulated cylinder; an ignition coil is connected to the simulated cylinder; a single-chip microcomputer is connected to the ignition coil; and an exhaust assembly is connected to the simulated cylinder. By connecting the intake assembly to the simulated cylinder, it is used to supply high-pressure gas to the simulated cylinder, the ignition coil is connected to the simulated cylinder, the single-chip microcomputer is connected to the ignition coil, and is used to control the ignition coil to ignite, and the exhaust assembly is connected to the simulated cylinder, so that the excess high-pressure gas in the simulated cylinder can be discharged, and the ignition coil is controlled by the single-chip microcomputer instead of the ECU in the car to discharge and ignite, and the simulated cylinder simulates the operation of the car engine. Therefore, in the process of the electromagnetic compatibility test of the ignition system, the test can be completed without relying on the engine, ECU and other components, and different working conditions of the engine can be simulated, thereby saving the test cost.

Description

Technical Field

[0001] The invention relates to the technical field of automobile ignition systems, and in particular to an auxiliary device used in an electromagnetic compatibility test process of an ignition system. Background Art

[0002] The electromagnetic compatibility of a vehicle is affected by many modules and devices. The ignition system generates and releases tens of thousands of volts of high voltage at the spark plug, which is most likely to cause the electromagnetic compatibility of the vehicle to fail to meet the requirements. When the ignition system is tested for electromagnetic compatibility, since the ignition system is controlled by the vehicle ECU and the spark plug is installed on the engine, at least the engine and ECU need to cooperate to test. The engine needs the support of other modules when it is working, so it is very difficult to test the electromagnetic compatibility of the ignition system.

[0003] Therefore, it is necessary to design a set of auxiliary devices used in the electromagnetic compatibility test of the ignition system, so that the test process can be completed without relying on the engine, ECU and other components, and can simulate different working conditions of the engine, thereby saving test costs. Summary of the invention

[0004] The purpose of the present application is to overcome the above problems or at least partially solve or alleviate the above problems.

[0005] To this end, the present invention provides an auxiliary device used in the electromagnetic compatibility test process of an ignition system, comprising:

[0006] A simulated cylinder is set on the ground to simulate the operation of a car engine;

[0007] An air intake assembly connected to the simulated cylinder to supply high-pressure gas to the simulated cylinder;

[0008] an ignition coil connected to the simulated cylinder;

[0009] A single chip microcomputer is connected to the ignition coil to control the ignition coil to ignite;

[0010] An exhaust component is connected to the simulated cylinder and is used to exhaust excess high-pressure gas in the simulated cylinder.

[0011] This technical solution connects the intake assembly to the simulated cylinder to supply high-pressure gas to the simulated cylinder, connects the ignition coil to the simulated cylinder, connects the single-chip microcomputer to the ignition coil to control the ignition of the ignition coil, and connects the exhaust assembly to the simulated cylinder to discharge the excess high-pressure gas in the simulated cylinder. The single-chip microcomputer replaces the ECU in the car to control the ignition coil to discharge and ignite, and the simulated cylinder simulates the operation of the car engine. Therefore, during the electromagnetic compatibility test of the ignition system, the test can be completed without relying on the engine, ECU and other components, and different working conditions of the engine can be simulated, thereby saving test costs.

[0012] In addition, the above technical solution of the present invention may also have the following additional technical features:

[0013] In the above technical solution, the simulated cylinder includes an upper portion of a simulated cylinder body and a lower portion of a simulated cylinder body;

[0014] The upper part of the simulated cylinder body and the lower part of the simulated cylinder body are connected by threads, and sealant is applied at the connection to ensure sealing.

[0015] In the above technical solution, the upper part of the simulated cylinder body has an air intake assembly mounting hole;

[0016] The air intake assembly includes an air intake hose and an air intake high-pressure pipe connected to the lower end of the air intake hose. The upper end of the air intake hose is connected to a high-pressure gas cylinder for injecting high-pressure gas into the simulated cylinder.

[0017] In the above technical solution, the air intake assembly further includes a manual air intake switch or an electric switch installed in the middle of the air intake hose to control the high-pressure gas of the high-pressure gas cylinder to enter the simulated cylinder, and the electric switch is connected to the air pressure sensor, and the electric switch is connected to the single-chip microcomputer to realize automatic pressure control;

[0018] Among them, the signal output end of the air pressure sensor is connected to the first signal receiving end of the single-chip microcomputer, and the first signal output end of the single-chip microcomputer is connected to the signal receiving end of the electric switch, which is used to control the electric switch to be turned on or off.

[0019] In the above technical solution, the lower end of the intake high-pressure pipe is connected to the intake assembly mounting hole via an intake connector.

[0020] In the above technical solution, the upper part of the simulated cylinder body also has an ignition coil mounting hole;

[0021] The ignition coil includes an integrated primary coil and a secondary coil, and a spark plug threadably mounted on the ignition coil mounting hole;

[0022] The wiring terminal of the primary coil is connected to the single chip microcomputer to control the power off of the primary coil, and the spark plug is plugged into the wiring terminal of the secondary coil so that the secondary coil generates high voltage, and then the spark plug discharges for discharge ignition.

[0023] In the above technical solution, the upper part of the simulated cylinder body also has an exhaust assembly mounting hole;

[0024] The exhaust assembly includes a vertical high-pressure pipe and a horizontal high-pressure pipe, the lower end of the vertical high-pressure pipe is connected to the exhaust assembly mounting hole, the upper end of the vertical high-pressure pipe is installed with a pressure gauge for monitoring the pressure value of the simulated cylinder, the middle part of the vertical high-pressure pipe is connected to one end of the horizontal high-pressure pipe, the horizontal high-pressure pipe is installed with a manual switch or an electric switch, the electric switch is connected to the air pressure sensor, and the electric switch is connected to the single-chip microcomputer for realizing automatic pressure control;

[0025] Among them, the signal output end of the air pressure sensor is connected to the second signal receiving end of the single-chip microcomputer, and the second signal output end of the single-chip microcomputer is connected to the signal receiving end of the electric switch, which is used to control the electric switch to be turned on or off.

[0026] In the above technical solution, the lower end of the vertical high-pressure pipe is connected to the exhaust assembly mounting hole through an exhaust connector;

[0027] The middle portion of the vertical high-pressure pipe is connected to one end of the horizontal high-pressure pipe through a tee.

[0028] The above technical solution also includes a grounding terminal, which is arranged on the side of the lower part of the simulated cylinder body and is used to connect to the negative pole of the secondary coil and the laboratory ground through a low-resistance wire.

[0029] The above technical solution also includes a battery, which is connected to the single-chip microcomputer and is used to supply power to the single-chip microcomputer.

[0030] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0032] Figure 1is a schematic structural diagram of an auxiliary device used in an ignition system electromagnetic compatibility test process according to an embodiment of the present application;

[0033] Figure 2 yes Figure 1 The schematic diagram of the connection of the microcontroller, battery and ignition coil of the auxiliary device used in the electromagnetic compatibility test of the ignition system is shown;

[0034] Figure 3 yes Figure 1 The figure shows a schematic diagram of the structure of the electric switch and the electric switch installed in the auxiliary device used in the electromagnetic compatibility test of the ignition system.

[0035] Markings in the figure:

[0036] 1-simulated cylinder; 11-simulated cylinder body upper part; 12-simulated cylinder body lower part; 13-grounding terminal;

[0037] 2-air intake assembly; 21-air intake hose; 22-air intake high pressure pipe; 23-manual air intake switch; 24-air intake connector; 25-electric switch; 26-three-way connector;

[0038] 3- ignition coil; 31- primary coil; 32- secondary coil; 33- spark plug; 34- negative pole of secondary coil; 35- positive pole of secondary coil;

[0039] 4- single chip microcomputer;

[0040] 5-exhaust assembly; 51-pressure gauge; 52-vertical high-pressure pipe; 53-tee; 54-exhaust connector; 55-manual switch; 56-horizontal high-pressure pipe; 57-electric switch;

[0041] 6-Battery. DETAILED DESCRIPTION

[0042] The present application is further described in detail below through specific embodiments in combination with the accompanying drawings. The following embodiments are used to illustrate the present application but are not used to limit the scope of the present application.

[0043] Figure 1 is a schematic structural diagram of an auxiliary device used in an ignition system electromagnetic compatibility test process according to an embodiment of the present application; Figure 2 yes Figure 1 The following is a schematic diagram of the connection of the microcontroller, battery and ignition coil of the auxiliary device used in the electromagnetic compatibility test of the ignition system. Figure 1 and Figure 2As shown, the auxiliary device used in the electromagnetic compatibility test of the ignition system generally may include a simulated cylinder 1, an intake assembly 2, an ignition coil 3, a single-chip microcomputer 4 and an exhaust assembly 5. Among them, the simulated cylinder 1 is fixed to a workbench (not shown in the figure) by bolts, and the workbench is fixed by a frame and a panel, or is directly fixed to the ground by bolts, and is used to simulate the operation of the automobile engine. The intake assembly 2 is connected to the simulated cylinder 1, and is used to supply high-pressure gas to the simulated cylinder 1 to realize the operation of the simulated cylinder 1. The ignition coil 3 is connected to the simulated cylinder 1, and is used to ground the ignition coil 3. The single-chip microcomputer 4 is connected to the ignition coil 3 to control the ignition of the ignition coil 3. The exhaust assembly 5 is connected to the simulated cylinder 1 to promote the discharge of excess high-pressure gas in the simulated cylinder 1, which helps to improve the safety performance. By adopting the form of driving the IGBT (insulated gate bipolar transistor) by the single-chip microcomputer 4, the power demand of the ignition coil 3 can be achieved. When the single-chip microcomputer 4 controls the ignition coil 3 for testing, the ECU (electronic control unit) is not required, and the ignition timing control is relatively accurate. The simulation cylinder 1 is used to realize the simulation of the air pressure in the cylinder. At the same time, the device has a reasonable structure, simple and convenient operation, low manufacturing cost, convenient maintenance, small size, and stable and reliable performance.

[0044] This technical solution connects the intake assembly 2 with the simulated cylinder 1 to supply high-pressure gas to the simulated cylinder 1, the ignition coil 3 with the simulated cylinder 1, the single-chip microcomputer 4 with the ignition coil 3 to control the ignition of the ignition coil 3, and the exhaust assembly 5 with the simulated cylinder 1 to discharge the excess high-pressure gas in the simulated cylinder 1. The single-chip microcomputer 4 replaces the ECU in the car to control the ignition coil 3 to discharge and ignite, and the simulated cylinder 1 simulates the operation of the car engine. Therefore, during the electromagnetic compatibility test of the ignition system, the test can be completed without relying on the engine, ECU and other components, and different working conditions of the engine can be simulated, thereby saving the test cost.

[0045] like Figure 1 As shown, in a specific embodiment, optionally, the simulated cylinder 1 may generally include a simulated cylinder body upper part 11 and a simulated cylinder body lower part 12, which are generally connected by threads to facilitate disassembly and maintenance, and sealant is applied at the connection to ensure sealing, so as to ensure that the simulated cylinder 1 does not leak high-pressure gas and ensure the normal operation of the simulated cylinder 1. The simulated cylinder 1 simulates the engine cylinder pressure by filling it with inert gas nitrogen, and at the same time, the pressure gauge 51 connected thereto displays the real-time pressure.

[0046] In addition, the upper part 11 of the simulated cylinder body and the lower part 12 of the simulated cylinder body can also be formed in one piece, so as to facilitate processing. The simulated cylinder 1 is generally a rectangular body.

[0047] In this way, by simulating the operation of the automobile engine by simulating cylinder 1, the test can be completed without relying on the engine during the electromagnetic compatibility test of the ignition system. Different working conditions of the engine can be simulated to save test costs. At the same time, it is simple and convenient to operate, and has the characteristics of small size, light weight and reasonable structure.

[0048] like Figure 1 As shown, in a specific embodiment, optionally, the upper part 11 of the simulated cylinder body has an air intake assembly mounting hole (not marked in the figure), and the air intake assembly mounting hole is used to install the air intake assembly 2. Specifically, the air intake assembly 2 generally includes an air intake hose 21, an air intake high-pressure pipe 22 and a high-pressure gas cylinder (not shown in the figure). Among them, the lower end of the air intake hose 21 is plugged with the upper end of the air intake high-pressure pipe 22 and is compressed and sealed by a fixing hoop (not marked in the figure), which is convenient for disassembly and maintenance. Of course, the lower end of the air intake hose 21 can also be processed with an integral metal joint, and has a thread, which is used to be screwed with the upper end of the air intake high-pressure pipe 22. The upper end of the air intake hose 21 is plugged with the outlet end of the high-pressure gas cylinder and is compressed and sealed by a fixing hoop, which is convenient for disassembly and maintenance. Of course, the upper end of the air intake hose 21 can also be processed with another integral metal joint, and has a thread, which is used to be screwed with the outlet end of the high-pressure gas cylinder. High-pressure gas is injected into the simulated cylinder 1 through the intake hose 21, the intake high-pressure pipe 22 and the high-pressure gas cylinder, so that the simulated cylinder 1 can simulate the operation of the automobile engine.

[0049] like Figure 1 As shown, in a specific embodiment, optionally, the air intake assembly 2 may also include a manual air intake switch 23 or an electric switch 25 installed in the middle of the air intake hose 21 to control the high-pressure gas in the high-pressure gas cylinder to enter the simulated cylinder 1. The manual air intake switch 23 is used to control the high-pressure gas in the high-pressure gas cylinder to enter the simulated cylinder 1, which is convenient for operation.

[0050] Figure 3 yes Figure 1 The diagram shows the structure of the auxiliary device used in the electromagnetic compatibility test of the ignition system, the electric switch and the electric switch. Figure 3 As shown, in this embodiment, optionally, the electric switch 25 is connected to the air pressure sensor (not shown in the figure) through a three-way connector 26, and the electric switch 25 is connected to the single-chip microcomputer 4 through a line or signal to realize automatic pressure control. Specifically, the air pressure sensor data is collected by the single-chip microcomputer 4, and the sensor data is judged. When the set pressure value upper and lower limits are met, the single-chip microcomputer 4 switches the corresponding electric switch 25 to realize automatic pressure control.

[0051] In this embodiment, optionally, the signal output end of the air pressure sensor is connected to the first signal receiving end of the single chip microcomputer 4, and the first signal output end of the single chip microcomputer 4 is connected to the signal receiving end of the electric switch 25. The air pressure sensor data is obtained by the single chip microcomputer 4 to judge the air pressure sensor data, and then control the electric switch 25 to open or close.

[0052] like Figure 1 As shown, in this embodiment, optionally, the lower end of the intake high-pressure pipe 22 is detachably connected to the intake assembly mounting hole through the intake connector 24, which is convenient for disassembly and maintenance. Specifically, the intake connector 24 is an existing connector, the lower end of the intake connector 24 is threadedly connected to the intake assembly mounting hole of the simulated cylinder 1, and a sealant is applied at the connection to ensure the sealing, and the upper end of the intake connector 24 is threadedly connected to the lower end of the intake high-pressure pipe 22. The intake high-pressure pipe 22 is connected to the simulated cylinder 1 through the intake connector 24, so that the intake assembly 2 and the simulated cylinder 1 are connected to realize the supply of high-pressure gas.

[0053] like Figure 1 As shown, in a specific embodiment, optionally, the upper part 11 of the simulated cylinder body also has an ignition coil mounting hole (not marked in the figure) for mounting the ignition coil 3. The ignition coil 3 generally includes an integrated primary coil 31 and a secondary coil 32, and a spark plug 33 installed in the ignition coil mounting hole by threads. Specifically, the wiring terminal of the primary coil 31 is connected to the single-chip microcomputer 4 to control the power off of the primary coil 31, and the spark plug 33 is plugged into the wiring terminal of the secondary coil 32, so that the secondary coil 32 generates high voltage, and then the spark plug 33 discharges for discharge ignition.

[0054] like Figure 1 As shown, in a specific embodiment, optionally, the upper part 11 of the simulated cylinder body also has an exhaust assembly mounting hole (not marked in the figure) for connecting to the exhaust assembly 5. Specifically, the exhaust assembly 5 may generally include a vertical high-pressure pipe 52 and a horizontal high-pressure pipe 56. Among them, the lower end of the vertical high-pressure pipe 52 is connected to the exhaust assembly mounting hole through an exhaust connector 54, and the upper end of the vertical high-pressure pipe 52 is threadedly installed with a pressure gauge 51 for monitoring the pressure value of the simulated cylinder 1. Further, the middle part of the vertical high-pressure pipe 52 is connected to one end of the horizontal high-pressure pipe 56, and the horizontal high-pressure pipe 56 is installed with a manual switch 55 or an electric switch 57. The high-pressure gas in the simulated cylinder 1 is controlled by the manual switch 55 to discharge the simulated cylinder 1, which is easy to operate.

[0055] like Figure 3As shown, in this embodiment, optionally, the electric switch 57 is connected to the air pressure sensor (not shown in the figure) through a three-way connector, and the electric switch 57 is connected to the single-chip microcomputer 4 through a line or signal to realize automatic pressure control. Specifically, the air pressure sensor data is collected by the single-chip microcomputer 4, and the sensor data is judged. When the set pressure value upper and lower limits are met, the single-chip microcomputer 4 switches the corresponding electric switch 57 to realize automatic pressure control.

[0056] In this embodiment, optionally, the signal output end of the air pressure sensor is connected to the second signal receiving end of the single chip microcomputer 4, and the second signal output end of the single chip microcomputer 4 is connected to the signal receiving end of the electric switch 57. The air pressure sensor data is obtained by the single chip microcomputer 4 to judge the air pressure sensor data, and then control the electric switch 57 to open or close.

[0057] like Figure 1 As shown, in this embodiment, optionally, the lower end of the vertical high-pressure pipe 52 is connected to the exhaust connector 54 by threading, or plugged and pressed by a fixing hoop. The middle of the vertical high-pressure pipe 52 is connected to one end of the horizontal high-pressure pipe 56 by a tee piece 53. The vertical high-pressure pipe 52 is vertically arranged, and the horizontal high-pressure pipe 56 is horizontally arranged to form an exhaust channel.

[0058] like Figure 2 As shown, the grounding terminal 13 is arranged on the side of the lower part 12 of the simulated cylinder body, and is used to be connected to the negative electrode 34 of the secondary coil 32 through a low resistance wire to achieve grounding, and the end opposite to the negative electrode 34 is the positive electrode 35 of the secondary coil.

[0059] like Figure 1 As shown, the battery 6 is connected to the single-chip microcomputer 4 through a line, and is used to supply power to the single-chip microcomputer 4 .

[0060] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An auxiliary device used in the electromagnetic compatibility test process of an ignition system, characterized in that: include: The simulated cylinder is arranged on the ground and is used to simulate the operation of the automobile engine; the simulated cylinder comprises an upper part of the simulated cylinder body and a lower part of the simulated cylinder body; the simulated cylinder is filled with inert gas; An air intake assembly connected to the simulated cylinder to supply high-pressure inert gas to the simulated cylinder; an ignition coil connected to the simulated cylinder; A single chip microcomputer is connected to the ignition coil to control the ignition coil to ignite; An exhaust assembly is connected to the simulated cylinder and is used to exhaust excess high-pressure gas in the simulated cylinder; the upper part of the simulated cylinder body also has an exhaust assembly mounting hole; the exhaust assembly includes a vertical high-pressure pipe and a horizontal high-pressure pipe, the lower end of the vertical high-pressure pipe is connected to the exhaust assembly mounting hole, the upper end of the vertical high-pressure pipe is installed with a pressure gauge for monitoring the pressure value of the simulated cylinder, the middle part of the vertical high-pressure pipe is connected to one end of the horizontal high-pressure pipe, and the horizontal high-pressure pipe is installed with a manual switch or an electric switch.

2. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 1, characterized in that: The upper part of the simulated cylinder body and the lower part of the simulated cylinder body are connected by threads, and sealant is applied at the connection to ensure sealing.

3. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 2, characterized in that: The upper part of the simulated cylinder body is provided with an air intake assembly mounting hole; The air intake assembly includes an air intake hose and an air intake high-pressure pipe connected to the lower end of the air intake hose. The upper end of the air intake hose is connected to a high-pressure gas cylinder for injecting high-pressure gas into the simulated cylinder.

4. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 3, characterized in that: The air intake assembly further includes a manual air intake switch or an electric switch installed in the middle of the air intake hose to control the high-pressure gas of the high-pressure gas cylinder to enter the simulated cylinder, the electric switch is connected to the air pressure sensor, and the electric switch is connected to the single-chip microcomputer to realize automatic pressure control; Among them, the signal output end of the air pressure sensor is connected to the first signal receiving end of the single-chip microcomputer, and the first signal output end of the single-chip microcomputer is connected to the signal receiving end of the electric switch, which is used to control the electric switch to be turned on or off.

5. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 3, characterized in that: The lower end of the intake high pressure pipe is connected to the intake assembly mounting hole via an intake connector.

6. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 2, characterized in that: The upper part of the simulated cylinder body also has an ignition coil mounting hole; The ignition coil includes an integrated primary coil and a secondary coil, and a spark plug threadably mounted on the ignition coil mounting hole; The wiring terminal of the primary coil is connected to the single chip microcomputer to control the power off of the primary coil, and the spark plug is plugged into the wiring terminal of the secondary coil so that the secondary coil generates high voltage, and then the spark plug discharges for discharge ignition.

7. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 2, characterized in that: The electric switch is connected to the air pressure sensor, and the electric switch is connected to the single chip microcomputer to realize automatic pressure control; Among them, the signal output end of the air pressure sensor is connected to the second signal receiving end of the single-chip microcomputer, and the second signal output end of the single-chip microcomputer is connected to the signal receiving end of the electric switch, which is used to control the electric switch to be turned on or off.

8. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 7, characterized in that: The lower end of the vertical high-pressure pipe is connected to the exhaust assembly mounting hole through an exhaust connector; The middle portion of the vertical high-pressure pipe is connected to one end of the horizontal high-pressure pipe through a tee.

9. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to claim 6, characterized in that: It also includes a grounding terminal, which is arranged on the side of the lower part of the simulation cylinder body and is used to be connected to the negative electrode of the secondary coil and the laboratory ground through a low-resistance wire.

10. The auxiliary device used in the electromagnetic compatibility test process of the ignition system according to any one of claims 1 to 9, characterized in that: It also includes a storage battery, which is connected to the single-chip microcomputer and is used to supply power to the single-chip microcomputer.

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