Vehicle air pump rack test system and application method thereof

Abstract

The invention discloses a rack test system for a vehicle air pump and an application method of the rack test system, and belongs to the technical field of vehicle air pump performance testing, the rack test system comprises a touch screen (1), an industrial personal computer (2) and a main control module (3), and the touch screen (1), the industrial personal computer (2) and the main control module (3) directly communicate through the Ethernet; the device further comprises a temperature control liquid temperature and pressure adjusting unit (IV), a lubricating oil temperature and pressure adjusting unit (V), a driving shaft power control unit (VI), a gas pressure measurement and control unit (VI) and a gas flow measurement unit (VII). And the main control module (3) is respectively connected with the temperature control liquid temperature and pressure regulating unit (IV), the lubricating oil temperature and pressure regulating unit (V), the driving shaft power control unit (VI), the gas pressure measurement and control unit (VI) and the gas flow measurement unit (VII). The parameters of the air pump for the test vehicle are quickly obtained through the control circuit and an efficient and safe control program.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle air pump performance test, more particularly to a vehicle air pump bench test system and application method thereof. BACKGROUND

[0002] With the continuous development of science and technology, people pay more attention to the reliability and safety of equipment, and the vehicle air pump as the core element of vehicle compressed gas, the discussion on its working performance increases day by day. In order to actually understand the performance of the working state of the assembled vehicle air pump, a complete bench system is needed.

[0003] Therefore, how to provide a vehicle air pump bench test system and application method thereof which can solve the above problems is a problem that technicians in the field need to solve urgently. SUMMARY

[0004] Therefore, the present application provides a vehicle air pump bench test system and application method thereof, which can quickly obtain the test vehicle air pump parameters through the control circuit and efficient and safe control program.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: A vehicle air pump bench test system, comprising: Touch screen 1, industrial computer and main control module 3, the touch screen 1, the industrial computer and the main control module 3 communicate directly through Ethernet; Further comprising: temperature control liquid temperature pressure regulating unit IV, lubricating oil temperature pressure regulating unit V, drive shaft power control unit VI, gas pressure measurement and control unit VII and gas flow measurement unit VIII; The main control module 3 is connected with the temperature control liquid temperature pressure regulating unit IV, the lubricating oil temperature pressure regulating unit V, the drive shaft power control unit VI, the gas pressure measurement and control unit VII and the gas flow measurement unit VIII respectively.

[0006] Further, the temperature control liquid temperature pressure regulating unit IV comprises: Temperature control liquid tank 4, temperature control liquid pump 5, temperature control liquid heater 6, three-way temperature control liquid temperature proportional valve 7, temperature control liquid pressure regulating valve 8, temperature control liquid pressure sensor 9 and temperature control liquid temperature sensor 10; The input end of the temperature control liquid pump 5 is connected to the temperature control liquid tank 4, the output end of the temperature control liquid pump 5 is divided into two ways, one way is connected to the first inlet of the three-way temperature control liquid temperature proportional valve 7 after the temperature control liquid heater 6, the other way is directly connected to the second inlet of the three-way temperature control liquid temperature proportional valve 7; the outlet of the three-way temperature control liquid temperature proportional valve 7 is connected to the temperature control liquid pressure regulating valve 8, the temperature control liquid pressure sensor 9 and the temperature control liquid temperature sensor 10 in turn and then connected to the air pump 11 of the external test vehicle.

[0007] Further, the driving shaft power control unit VI includes a frequency converter 12, a rotating speed sensor 13 and a variable frequency motor 14, wherein the rotating speed sensor 13 is connected to the variable frequency motor 14, and the variable frequency motor 14 is connected to the air pump 11 through a transmission shaft; The gas pressure measuring and control unit VII includes a gas pressure switch 15, a gas pressure sensor 18 and a gas pressure regulating valve 17, the outlet end of the gas generated after the air pump 11 of the external test vehicle works is connected to the gas pressure switch 15 and the gas pressure sensor 18 respectively, and the gas pressure switch 15 is connected to the gas pressure regulating valve 17; The main control module 3 communicates with the frequency converter 12 through 485 to monitor the running data of the frequency converter in real time; when the gas pressure sensor 18 detects that the pressure value of the air pump 11 exceeds the set threshold value, the main control module 3 automatically triggers the frequency converter 12 to switch to the starting power operation mode; The gas pressure switch 15 is connected to the frequency converter 12, which is used to manually trigger the frequency converter 12 to switch to the starting power operation mode when the output pressure of the air pump 11 exceeds the threshold value.

[0008] Further, it also includes the gas storage tank inlet 16 connected to the gas pressure sensor 18.

[0009] Further, the gas flow measuring unit VIII includes a gas flow meter 19 installed at the connecting shaft of the air pump 11 of the external test vehicle, which is used to detect the gas leakage amount.

[0010] Further, the lubricating oil temperature and pressure regulating unit V includes: A lubricating oil temperature sensor 20, a lubricating oil pressure sensor 21, a lubricating oil pressure regulating valve 22, a three-way lubricating oil temperature proportional valve 23, a lubricating oil heater 24, a lubricating oil pump 25 and a lubricating oil tank 26; The inlet end of the lubricating oil pump 25 is connected to the lubricating oil tank 26, and the output end of the lubricating oil pump 25 is divided into two ways: the first way is connected to the inlet A of the three-way proportional valve 23 through the heater 24; the second way is directly connected to the inlet B of the three-way proportional valve 23; The outlet of the three-way proportional valve 23 is connected to the pressure regulating valve 22, the pressure sensor 21 and the temperature sensor 20 in turn and then connected to the air pump 11 of the external test vehicle.

[0011] Further, the temperature control liquid pump 5 is provided with idle protection: If the temperature control hydraulic pressure sensor 9 does not detect pressure after 3 seconds of starting, the pump is automatically stopped and an alarm signal is triggered to the main control module 3.

[0012] Further, the lubricating oil pump 25 is provided with idle protection: If the lubricating oil pressure sensor 21 does not detect pressure after 3 seconds of starting, the pump is automatically stopped and an alarm signal is triggered to the main control module 3.

[0013] Further, through the force control configuration software of the industrial computer, the test is carried out, and the test steps are: S1: Start the force control software and select user login; to ensure that the test related personnel operate; S2: Enter the test interface, simulate different environmental parameters according to the test requirements; S3: Record test data and generate test curves; S4: Generate a report and print; S5: Exit the test system.

[0014] On the other hand, the application provides an application method of a vehicle gas pump bench test system for vehicle gas pump performance test, comprising the following steps: (a) Through the temperature control liquid temperature and pressure adjusting unit IV and the lubricating oil temperature and pressure adjusting unit V, the temperature and pressure parameters of the temperature control liquid and the lubricating oil input into the test vehicle gas pump 11 are independently controlled, and the running environment of the gas pump under different working conditions is simulated; (b) Through the frequency converter 12 and the rotating speed sensor 13 of the driving shaft power control unit VI, the output power and rotating speed of the variable frequency motor 14 are adjusted, and the driving shaft load is monitored in real time; (c) Through the gas pressure measurement and control unit VII: Through the gas pressure switch 15 hardware directly connected to the frequency converter 12, the frequency converter power reduction protection is directly triggered when the gas pressure is out of limit; Through the gas pressure sensor 18 and the pressure regulating valve 17, the gas pump outlet pressure is closed-loop controlled; (d) Through the gas flow meter 19 of the gas flow measurement unit VIII, the leakage amount of the gas pump driving shaft sealing place is detected, and the sealing performance of the gas pump is evaluated; (e) The test curve and the report are generated by the force control configuration software of the industrial computer 2, and the multi-dimensional performance test of the gas pump efficiency, service life and safety is completed.

[0015] Compared with the prior art, the application provides a vehicle air pump bench test system and an application method thereof, redundancy protection design of a hardware direct connection pressure switch and a frequency converter fundamentally eliminates the risk of air pump overpressure explosion, double-loop temperature regulation structure is adopted to realize precise simulation of extreme working conditions, and modular independent control architecture is combined to greatly improve maintenance efficiency; pump body idling protection and shaft end leakage monitoring functions are integrated, test data is conveniently and efficiently obtained while ensuring test safety, sealing performance and full working condition operation efficiency of the vehicle air pump are comprehensively quantitatively evaluated, and a high reliability test platform is provided for product research and development. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on the provided drawings also belong to the protection scope of the present application.

[0017] Figure 1 It is a system structure schematic diagram of the present application. Figure 2 It is a touch screen operation interface provided by the present application.

[0018] In the figure, 1 is a touch screen, 2 is an industrial computer, 3 is a main control module, 4 is a temperature control liquid tank, 5 is a temperature control liquid pump, 6 is a temperature control liquid heater, 7 is a three-way temperature control liquid temperature proportional valve, 8 is a temperature control liquid pressure regulating valve, 9 is a temperature control liquid pressure sensor, 10 is a temperature control liquid temperature sensor, 11 is a test vehicle air pump, 12 is a frequency converter, 13 is a rotating speed sensor, 14 is a variable frequency motor, 15 is a gas pressure switch, 16 is a gas storage tank, 17 is a gas pressure regulating valve, 18 is a gas pressure sensor, 19 is a gas flowmeter, 20 is a lubricating oil temperature sensor, 21 is a lubricating oil pressure sensor, 22 is a lubricating oil pressure regulating valve, 23 is a three-way lubricating oil temperature proportional valve, 24 is a lubricating oil heater, 25 is a lubricating oil pump, and 26 is a lubricating oil tank. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0020] The embodiment of the application discloses a kind of for vehicle gas pump bench test system, it is related to automobile parts test field.The system includes industrial computer 2, touch screen 1, main control module 3, temperature control liquid temperature pressure regulating unit IV, lubricating oil temperature pressure regulating unit V, driving shaft power control unit VI, gas pressure measurement and control unit VII, gas flow measurement unit VIII.The industrial computer 2, touch screen 1 are connected with main control module 3 by Ethernet.Main control module 3 is connected with temperature control liquid temperature pressure regulating unit IV, lubricating oil temperature pressure regulating unit V, driving shaft power control unit VI, gas pressure measurement and control unit VII, gas flow measurement unit VIII.

[0021] As Figure 1 Shown, temperature control liquid temperature pressure regulating unit IV includes temperature control liquid tank 4, temperature control liquid pump 5, temperature control liquid heater 6, three-way temperature control liquid temperature proportional valve 7, temperature control liquid pressure regulating valve 8, temperature control liquid pressure sensor 9, temperature control liquid temperature sensor 10.Temperature control liquid pump 4 import end is connected to temperature control liquid tank 4, and one end of export is connected to temperature control liquid heater 6, and the other end is connected to the import one end of three-way temperature control liquid proportional valve 7;Temperature control liquid heater 6 after heating temperature control liquid is connected to the other import end of three-way temperature control liquid proportional valve 7.Three-way temperature control liquid proportional valve 7 export end is connected to the import end of temperature control liquid pressure regulating valve 8, and the export end of temperature control liquid pressure regulating valve 8 is connected to pressure sensor 9 and temperature control liquid temperature sensor 10, and then connected to test vehicle gas pump 11.Temperature control liquid after being connected to experimental vehicle pump returns to temperature control liquid tank 4, and forms the temperature control liquid circulation required by test.The system is just run when the system, start temperature control liquid pump 5 after 3S, no temperature control liquid pressure value is detected, then disconnect temperature control liquid pump 5, and provide alarm signal, avoid temperature control liquid pump 5 idling.When temperature control liquid pump 5 can normally operate, temperature control liquid temperature sensor value 10 is collected in real time, when temperature control liquid temperature is less than or equal to set value, as feedback value control temperature control liquid heater 6 to operate;When heating temperature is higher than set value, as feedback value control three-way temperature control liquid temperature proportional valve 7 to operate.Until temperature control liquid temperature reaches the requirement of test.

[0022] As Figure 1As shown, the lubricating oil temperature pressure regulating unit V contains the lubricating oil tank 25, lubricating oil pump 24, lubricating oil heater 23, three-way lubricating oil temperature proportional valve 22, lubricating oil pressure regulating valve 21, lubricating oil pressure sensor 20, and lubricating oil temperature sensor 19. The inlet end of the lubricating oil pump 24 is connected to the lubricating oil tank 25, and one end of the outlet is connected to the lubricating oil heater 23, and the other end is connected to the three-way lubricating oil proportional valve 22. The heated lubricating oil is connected to the other inlet end of the three-way lubricating oil proportional valve 22. The outlet end of the three-way lubricating oil proportional valve 22 is connected to the inlet end of the lubricating oil pressure regulating valve 21, and the outlet end of the lubricating oil pressure regulating valve 8 is connected to the lubricating oil pressure sensor 9 and the lubricating oil temperature sensor 10, and then connected to the test vehicle gas pump 11. The lubricating oil after being connected to the test vehicle pump returns to the temperature control liquid tank 25, forming a lubricating oil circulation system. When the system is just running, start the lubricating oil pump 5 for 3s, and no lubricating oil pressure value is detected, then disconnect the temperature control liquid pump 24, and provide an alarm signal to avoid the temperature control liquid pump 24 idling. When the temperature control liquid pump 24 can operate normally, the lubricating oil temperature sensor value 19 is collected in real time, and when the lubricating oil temperature is lower than or equal to the set value, it is used as a feedback value to control the operation of the lubricating oil heater 23; when the heating temperature is higher than the set value, it is used as a feedback value to control the operation of the three-way lubricating oil temperature proportional valve 22 through PID calculation. Until the temperature control liquid temperature reaches the test requirement.

[0023] As shown in Figure 1 The drive shaft power control unit VI contains a speed sensor 12, a frequency converter 12, and a variable frequency motor 13. The frequency converter 12 communicates with the main control module 3 through RS485, which can control the frequency converter and collect the working state of the frequency converter in real time. The variable frequency motor is connected to the test vehicle gas pump 11 through a transmission shaft, which drives the test vehicle gas pump to operate according to the test requirements.

[0024] As shown in Figure 1 The gas pressure measurement and control unit VII contains a gas pressure switch 14, a gas pressure sensor 17, and a gas pressure regulating valve 16. The outlet end of the gas generated by the test vehicle gas pump 11 is connected to the gas pressure switch 14 and the gas pressure sensor 17, and then one way is connected to the gas pressure regulating valve 16, and the other way is connected to the gas storage tank inlet end 15. When the test vehicle pump is working, the test vehicle pump gas pressure value is collected in real time by the gas pressure sensor 17, which is used as a feedback signal to adjust the gas pressure regulating valve 16 through PID calculation to obtain the required gas pressure for the test.

[0025] As shown in Figure 1 The gas flow measurement unit VIII contains a gas flow meter, which is used to measure the air leakage at the shaft of the test vehicle gas pump.

[0026] Further, the drive shaft power control unit VI and the gas pressure measurement and control unit VII introduce a gas pressure switch 15, when the pressure generated by the test vehicle gas pump is too large, the pressure switch is triggered, without passing through the control module, the frequency converter 12 is triggered into the protection state, so that the drive shaft runs according to the starting power, and then protects the moving parts of the test vehicle gas pump, and improves the safety of the vehicle gas pump bench system.

[0027] Further, the system programming adopts a plurality of independently controlled units, each unit is independently separated, can obtain test data at the same time, greatly reduces the fault. This control mode can know the fault source faster on the one hand, improve the test efficiency, and when the control module fails, only the corresponding module is replaced, which greatly saves the test cost.

[0028] Further, the industrial computer 2, the touch screen 1 and the main control module 3 are connected through Ethernet, the intermediate redundant circuit is removed, and the test system is simplified.

[0029] Further, the main control module 3 and the frequency converter 12 adopt 485 communication, and the working data of the frequency converter is obtained in real time, which is convenient for fault elimination.

[0030] As shown in Figure 2 The main test steps are as follows: S1 starts the force control software and selects user login; to ensure that the test personnel operate; S2 enters the test interface, simulates different environmental parameters according to the test requirements; S3 records test data and generates test curves; S4 generates a report and prints it; S5 exits the test system.

[0031] In the application, the drive shaft power control unit VI and the gas pressure measurement and control unit VII introduce a gas pressure switch 14, when the pressure generated by the test vehicle gas pump is too large, the pressure switch is triggered, without passing through the main control module, the frequency converter is triggered into the protection state, so that the drive shaft runs according to the starting power, and then protects the moving parts of the test vehicle gas pump, and improves the safety of the vehicle gas pump bench system.

[0032] The system programming adopts a plurality of independently controlled units, each unit is independently separated, can obtain test data at the same time, greatly reduces the fault. This control mode can know the fault source faster on the one hand, improve the test efficiency, and when the main control module fails, only the corresponding module is replaced, which greatly saves the test cost.

[0033] The system industrial computer 2, the touch screen 1 and the main control module 3 are connected through Ethernet, the intermediate redundant circuit is removed, and the test system is simplified.

[0034] The main control module 3 communicates with the frequency converter 12 through 485 communication to obtain real-time working data of the frequency converter, facilitating fault troubleshooting.

[0035] When the operation of the temperature control liquid pump is started for 3S, if the pressure sensor does not detect the temperature control liquid pressure, the temperature control liquid is stopped and an alarm signal is sent. The temperature control liquid pump can be effectively avoided from idling, and the service life of the temperature control liquid pump is prolonged.

[0036] When the operation of the lubricating oil pump is started for 3S, if the pressure sensor does not detect the lubricating oil pressure, the lubricating oil pump is stopped and an alarm signal is sent. The lubricating oil pump can be effectively avoided from idling, and the service life of the lubricating oil pump is prolonged.

[0037] On the other hand, the embodiment of the present application also discloses an application method of a vehicle air pump bench test system for vehicle air pump performance test, comprising the following steps: (a) The temperature and pressure parameters of the temperature control liquid and the lubricating oil input into the test vehicle air pump 11 are independently controlled by the temperature and pressure adjustment unit IV and the lubricating oil temperature and pressure adjustment unit V, so as to simulate the running environment of the air pump under different working conditions; (b) The output power and speed of the variable frequency motor 14 are adjusted by the frequency converter 12 and the speed sensor 13 of the driving shaft power control unit VI, and the driving shaft load is monitored in real time; (c) Through the gas pressure measurement and control unit VII: The frequency converter 12 is directly connected to the gas pressure switch 15, and the frequency converter is directly triggered to reduce power when the gas pressure is out of limit; The gas pressure sensor 18 and the pressure regulating valve 17 are used to close-loop control the outlet pressure of the air pump; (d) The gas flow meter 19 of the gas flow measurement unit VIII is used to detect the leakage amount of the driving shaft seal of the air pump, and evaluate the sealing performance of the air pump; (e) The test curve and report are generated by the force control configuration software of the industrial computer 2, and the multi-dimensional performance test of the air pump efficiency, service life and safety is completed.

[0038] Through the technical scheme, the drive shaft power control unit (VI) and the gas pressure measurement and control unit (VII) are introduced with a pressure switch, when the pressure generated by the gas pump of the test vehicle is too large after working, the pressure switch is triggered, the signal is sent to the frequency converter in the drive shaft power control unit, so that the drive shaft operates according to the starting power, and then the moving parts of the gas pump of the test vehicle are protected, and the safety of the test bench system is improved. In the system, the industrial computer 2, the touch screen 1 and the main control module 3 are connected through Ethernet, the intermediate redundant circuit is removed, and the test bench system is simplified. Programming adopts a plurality of separately controlled units, each unit is independently separated, test data can be obtained at the same time, faults are greatly reduced, the source of the fault can be known at the first time, corresponding functional module components can be replaced in time, and test cost is greatly saved.

[0039] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0040] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test bench system for automotive air pumps, characterized in that, include: The touch screen (1), the industrial computer (2), and the main control module (3) communicate directly via Ethernet. It also includes: temperature control fluid temperature and pressure regulation unit (Ⅳ), lubricating oil temperature and pressure regulation unit (Ⅴ), drive shaft power control unit (Ⅵ), gas pressure measurement and control unit (Ⅶ) and gas flow measurement unit (Ⅷ); The main control module (3) is connected to the temperature control fluid temperature and pressure regulating unit (Ⅳ), the lubricating oil temperature and pressure regulating unit (Ⅴ), the drive shaft power control unit (Ⅵ), the gas pressure measurement and control unit (Ⅶ) and the gas flow measurement unit (Ⅷ), respectively.

2. The test bench system for automotive air pumps according to claim 1, characterized in that, The temperature and pressure regulating unit (Ⅳ) for the temperature control fluid includes: Temperature control liquid tank (4), temperature control liquid pump (5), temperature control liquid heater (6), three-way temperature control liquid proportional valve (7), temperature control liquid pressure regulating valve (8), temperature control liquid pressure sensor (9) and temperature control liquid temperature sensor (10); The input end of the temperature control liquid pump (5) is connected to the temperature control liquid tank (4). The output end of the temperature control liquid pump (5) is divided into two paths. One path is connected to the temperature control liquid heater (6) and then enters the first inlet of the three-way temperature control liquid proportional valve (7). The other path is directly connected to the second inlet of the three-way temperature control liquid proportional valve (7). The outlet of the three-way temperature control liquid proportional valve (7) is connected in sequence to the temperature control liquid pressure regulating valve (8), the temperature control liquid pressure sensor (9), and the temperature control liquid temperature sensor (10) and then connected to the air pump (11) used by the external test vehicle.

3. The test bench system for automotive air pumps according to claim 2, characterized in that, The drive shaft power control unit (VI) includes a frequency converter (12), a speed sensor (13) and a frequency converter motor (14), wherein the speed sensor (13) is connected to the frequency converter motor (14), and the frequency converter motor (14) is connected to the air pump (11) via a drive shaft. The gas pressure measurement and control unit (VII) includes a gas pressure switch (15), a gas pressure sensor (18), and a gas pressure regulating valve (17). The outlet end of the gas generated by the air pump (11) used in the external test vehicle is connected to the gas pressure switch (15) and the gas pressure sensor (18) respectively. The gas pressure switch (15) is connected to the gas pressure regulating valve (17). The main control module (3) communicates with the frequency converter (12) via 485 to monitor the frequency converter's operating data in real time. When the gas pressure sensor (18) detects that the pressure value of the gas pump (11) exceeds the set threshold, the main control module (3) automatically triggers the frequency converter (12) to switch to the starting power operation mode. The gas pressure switch (15) is connected to the frequency converter (12) and is used to manually trigger the frequency converter (12) to switch to the start-up power operation mode when the output pressure of the gas pump (11) exceeds the threshold.

4. The test bench system for automotive air pumps according to claim 3, characterized in that, It also includes access to the inlet end (16) of the gas storage tank, which is connected to the gas pressure sensor (18).

5. A test bench system for automotive air pumps according to claim 3, characterized in that, The gas flow measurement unit (VIII) includes a gas flow meter (19), which is installed at the connecting shaft of the air pump (11) for the external test vehicle and is used to detect the amount of gas leakage.

6. The test bench system for automotive air pumps according to claim 1, characterized in that, The lubricating oil temperature and pressure regulating unit (V) includes: Lubricating oil temperature sensor (20), lubricating oil pressure sensor (21), lubricating oil pressure regulating valve (22), three-way lubricating oil temperature proportional valve (23), lubricating oil heater (24), lubricating oil pump (25), lubricating oil tank (26); The inlet of the lubricating oil pump (25) is connected to the lubricating oil tank (26), and the output of the lubricating oil pump (25) is divided into two paths: the first path is connected to the inlet A of the three-way proportional valve (23) via the heater (24); the second path is directly connected to the inlet B of the three-way proportional valve (23). The outlet of the three-way proportional valve (23) is connected in sequence to the pressure regulating valve (22), the pressure sensor (21) and the temperature sensor (20), and then connected to the air pump (11) of the external test vehicle.

7. A test bench system for automotive air pumps according to claim 2, characterized in that, The temperature-controlled liquid pump (5) is equipped with dry run protection: If the temperature control liquid pressure sensor (9) does not detect pressure 3 seconds after startup, the pump will automatically stop and trigger an alarm signal to the main control module (3).

8. A test bench system for automotive air pumps according to claim 6, characterized in that, The lubricating oil pump (25) is equipped with dry run protection: If the lubricating oil pressure sensor (21) does not detect pressure 3 seconds after startup, the pump will automatically stop and trigger an alarm signal to the main control module (3).

9. The test bench system for automotive air pumps according to claim 1, characterized in that, The experiment was conducted using the force control configuration software of the industrial control computer (2). The experiment steps were as follows: S1: Start the force control software and select user login; this is to ensure that relevant personnel can operate the test software. S2: Enter the test interface and simulate different environmental parameters according to the test requirements; S3: Record experimental data and generate experimental curves; S4: Generate and print the report; S5: Exit the test system.

10. The application method of the vehicle air pump bench test system according to any one of claims 1 to 9 in the performance testing of vehicle air pumps, characterized in that, Includes the following steps: (a) The temperature and pressure parameters of the temperature control fluid and lubricating oil of the air pump (11) used in the test vehicle are independently controlled by the temperature control fluid temperature and pressure regulating unit (Ⅳ) and the lubricating oil temperature and pressure regulating unit (Ⅴ) to simulate the operating environment of the air pump under different working conditions. (b) The output power and speed of the variable frequency motor (14) are adjusted by the inverter (12) and speed sensor (13) of the drive shaft power control unit (VI), and the drive shaft load is monitored in real time; (c) Via the gas pressure measurement and control unit (VII): By directly connecting the gas pressure switch (15) to the frequency converter (12) in hardware, the frequency converter's power reduction protection is directly triggered when the gas pressure exceeds the limit. The outlet pressure of the gas pump is controlled in a closed loop by a gas pressure sensor (18) and a pressure regulating valve (17); (d) The leakage at the gas pump drive shaft seal is detected by the gas flow meter (19) of the gas flow measurement unit (VIII), and the gas pump sealing performance is evaluated. (e) The force control configuration software of the industrial control computer (2) generates test curves and reports to complete the multi-dimensional performance test of the air pump efficiency, life and safety.

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