A test apparatus for gaseous fuel injection devices

Abstract

The patent relates to the technical field of fuel injection system test equipment, in particular to a test equipment suitable for gaseous fuel injection device, which comprises a spray test device, a fuel circulation control system, a temperature control system, a purge control system and a pressure control system, the fuel circulation control system can realize the atomization test and injection performance test of low-carbon fuel and the circulation recovery of gas-liquid two-phase fuel; the temperature control system and the pressure control system are mainly used to simulate the temperature and back pressure of the actual working environment of the needle valve pair on the diesel engine, and improve the environmental adaptability of the fuel injection device through environmental test; the purge control system, the pressure control system and the fuel circulation control system work together to remove the residual fuel in the fuel circulation control system, realize the performance test of the injection device, the environmental simulation of the injection device and the purge of the test system and the like, and improve the safety and reliability of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel injection system test equipment, and particularly relates to a test equipment suitable for fuel injection device of easy-gasification fuel. BACKGROUND

[0002] With the market demand for low-carbon and zero-carbon, low-carbon fuels such as methanol or ammonia fuel will be fully implemented in the future, but due to the fuel characteristics, such as toxic, harmful, easy-gasification, etc., the test device for fuel injection system must be put forward with higher and more special requirements, including safety, collection of gasification fuel, etc.; and the test device of high-pressure fuel system currently mostly adopts cold-drag test, especially the injection device-oil atomizer test cannot be close to the actual use, and the injection characteristics and atomization characteristics of low-carbon fuel cannot be tested. SUMMARY

[0003] The present application aims to provide a test equipment suitable for fuel injection device of easy-gasification fuel, so as to solve the problems that the existing test device cannot collect gasification fuel and has low safety.

[0004] In order to achieve the above-mentioned purpose, the basic scheme of the present application is as follows: a test equipment suitable for fuel injection device of easy-gasification fuel, comprising a spray test device, a fuel circulation control system, a temperature control system, a purge control system and a pressure control system, the fuel circulation control system, the temperature control system, the purge control system and the pressure control system are connected with the spray test device, the outlet of the purge control system is communicated with the atmosphere, the fuel circulation control system can realize the atomization test and injection performance test of low-carbon fuel and the circulation recovery of gas-liquid two-phase fuel; the temperature control system and the pressure control system are mainly used to simulate the temperature and back pressure of the actual working environment of the needle valve pair on the diesel engine, and to improve the environmental adaptability of the fuel injection device through environmental test; the purge control system, the pressure control system and the fuel circulation control system cooperate to remove the residual fuel in the fuel circulation control system.

[0005] Further, the spray test device comprises an oil injector mounting seat, a transparent test cabin, a valve core, an exhaust piston, a valve core tension spring, a piston tension spring, a connecting sleeve, a temperature sensor, a temperature controller, a plurality of pressure sensors and a plurality of high-speed cameras, the middle of the oil injector mounting seat is provided with an oil injector mounting hole, the oil injector mounting seat is fixed on the top of the transparent test cabin, the inside of the oil injector mounting seat is provided with an annular oil cavity, the upper end of the annular oil cavity is provided with a high-temperature oil inlet and a high-temperature oil outlet, the exhaust piston is installed inside the transparent test cabin, the valve core is installed in the middle of the exhaust piston, and the conical surface of the valve core is in close contact with the seat surface of the piston, the connecting sleeve is installed at the lower end of the transparent test cabin, the piston tension spring is installed between the exhaust piston and the connecting sleeve, the valve core tension spring is installed between the valve core and the connecting sleeve, the temperature sensor and the temperature controller are installed on the oil injector mounting seat, and the temperature sensor and the temperature controller are located in the annular oil cavity inside the oil injector mounting seat, a plurality of pressure sensors are installed on the upper surface of the test volume cavity in the middle of the transparent test cabin, and a plurality of high-speed cameras are respectively installed on the top center of the valve core and the upper end surface of the exhaust piston.

[0006] The valve core and the piston seat surface are provided with a fuel passage, the connecting sleeve is provided with a fuel through hole, and the fuel circulation control system is connected with the oil injector, the fuel through hole and the spray test device;

[0007] The top of the transparent test cabin is provided with a scavenging inlet and a scavenging outlet, and the purge control system is connected with the scavenging inlet and the scavenging outlet;

[0008] The lower end surface of the transparent test cabin is also provided with a hydraulic oil inlet and a hydraulic oil outlet, and the pressure control system is connected with the hydraulic oil inlet and the hydraulic oil outlet.

[0009] Further, the fuel circulation control system comprises a plurality of fuel valve switches, an air pump, a compressor, a plurality of fuel check valves, a fuel collection tank, a fuel delivery pump, a fuel storage tank, a fuel supply pump, an oil injection pump and a driving motor, the oil injection pump is connected with the driving motor, and the oil injection pump is connected with the oil injector installed on the spray test device, the fuel valve switch and the air pump are sequentially installed at the lower end outlet of the spray test device, a first line and a second line are arranged after the air pump, the first line is sequentially installed with the fuel valve switch, the fuel check valve, the compressor and the fuel check valve, the second line is only installed with the valve switch, the first line and the second line are combined into the fuel collection tank, the fuel delivery pump, the fuel storage tank and the fuel supply pump are sequentially installed in the rear section of the fuel collection tank, and the fuel supply pump is connected with the oil injection pump.

[0010] Further, the temperature control system comprises a high-temperature oil tank, two high-temperature oil valve switches, a high-temperature oil check valve and a high-temperature oil delivery pump, the high-temperature oil tank is provided with a temperature raising device, the oil tank is connected with the high-temperature oil delivery pump through the high-temperature oil valve switches, the high-temperature oil delivery pump is connected with a high-temperature oil inlet provided on the injector mounting seat through the high-temperature oil check valve, and the high-temperature oil outlet is connected with the oil tank through the high-temperature oil valve switches.

[0011] Further, the purge control system comprises a nitrogen storage device, a plurality of nitrogen valve switches, a plurality of nitrogen check valves and a gas booster pump, the nitrogen storage device is sequentially provided with the nitrogen valve switches and the gas booster pump at the rear end, the gas booster pump is connected with a purge inlet provided on the upper end face of the transparent test chamber through the nitrogen check valve, and the purge outlet is sequentially provided with the nitrogen valve switches and the nitrogen check valve at the rear end and is connected with the atmosphere.

[0012] Further, the pressure control system comprises a servo oil tank, a plurality of hydraulic oil valve switches, a plurality of hydraulic oil check valves and a hydraulic oil delivery pump, the servo oil tank is connected with the hydraulic oil delivery pump through the hydraulic oil valve switches, the hydraulic oil delivery pump is connected with a hydraulic oil inlet provided on the lower end face of the transparent test chamber through the hydraulic oil check valve, and the hydraulic oil outlet is connected with the servo oil tank through the hydraulic oil valve switches.

[0013] Further, the transparent test chamber is made of a visual transparent material resistant to pressure, temperature and oil.

[0014] Further, the fuel circulation control system further comprises a flow meter, and the flow meter is installed between the fuel injection pump and the fuel injector.

[0015] The beneficial effects of the scheme are as follows: (1) the spray test device in the scheme is connected with the fuel circulation control system, the temperature control system, the purge control system and the pressure control system, so that the performance test of the spray device, the environment simulation of the spray device and the purge of the test system are realized, and the safety and reliability of the system are improved.

[0016] (2) In the fuel circulation control system, the recovery and collection of the easily-gasified fuel are realized through the cooperation of the air extraction pump and the compressor, and the economy of the equipment test is improved.

[0017] (3) The temperature control system and the pressure control system cooperate, the actual working environment of the spray device is simulated more stably and uniformly through the high-temperature oil temperature control in the temperature control system and the servo oil hydraulic control in the pressure control system, the environmental adaptability of the spray device is verified, and more effective data are provided for the environmental adaptability research and improvement of the product.

[0018] (4) The test phenomenon can be directly observed through the transparent test cabin, and the spraying characteristics and atomization characteristics can be fully shot through the high-speed camera, and meanwhile the flow meter can more accurately collect performance data, so that more comprehensive and actual data can be provided for the optimization research of the product through multi-mode and multi-angle data collection.

[0019] (5) The blowing control system can jointly act with the air extraction pump, the exhaust piston and the like, so that the test volume cavity and the test system can be managed to blow away the fuel easy to gasify and diffuse, and the safety and reliability of the test of the toxic and harmful fuel can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole connection schematic diagram of the embodiment of the present application;

[0021] Figure 2 It is a specific structure schematic diagram of the spray test device in the embodiment of the present application;

[0022] Figure 3 It is a position schematic diagram of the temperature sensor and the temperature controller in the embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0024] The reference signs in the attached drawings of the specification include: fuel injector 1, injector mounting seat 2, transparent test chamber 3, valve core 4, exhaust piston 5, valve core tension spring 6, piston tension spring 7, connecting sleeve 8, high-temperature oil inlet 9, high-temperature oil outlet 10, annular oil cavity 11, scavenging inlet 12, scavenging outlet 13, test volume cavity 14, valve core taper surface 15, fuel passage a 16, piston seat surface 17, fuel passage b 18, hydraulic cavity 19, hydraulic outlet 20, hydraulic inlet 21, mounting hole 22, temperature sensor 23, temperature controller 24, pressure sensor 25, high-speed camera 26, fuel control system A, spray test device A1, fuel valve switch A2, air pump A3, compressor A4, fuel check valve A5, fuel collection tank A6, fuel delivery pump A7, fuel storage tank A8, fuel supply pump A9, fuel injection pump A10, flow meter A11, drive motor A12, temperature control system B, high-temperature oil tank B1, high-temperature oil valve switch B2, high-temperature oil check valve B3, high-temperature oil delivery pump B4, purge control system C, nitrogen storage device C1, nitrogen valve switch C2, nitrogen check valve C3, gas booster pump C4, pressure control system D, servo oil tank D1, hydraulic oil valve switch D2, hydraulic oil check valve D3, hydraulic oil delivery pump D4. Embodiment

[0025] Basically as shown in the attached Figure 1 : a test equipment suitable for gaseous fuel injection device, including spray test device A1, fuel circulation control system, temperature control system B, purge control system C and pressure control system D;

[0026] In combination Figure 2 , Figure 3As shown, the spray test device A1 includes an injector mounting base 2, a transparent test chamber 3, a valve core 4, an exhaust piston 5, a valve core tension spring 6, a piston tension spring 7, a connecting sleeve 8, a temperature sensor 23, a temperature controller 24, several pressure sensors 25, and several high-speed cameras 26. The injector mounting base 2 has an injector 1 mounting hole 22 in the middle. The injector mounting base 2 is fixed to the top of the transparent test chamber 3. The injector mounting base 2 has an annular oil chamber 11 inside. The upper end of the annular oil chamber 11 has a high-temperature oil inlet 9 and a high-temperature oil outlet 10. The transparent test chamber 3 is made of a pressure-resistant, temperature-resistant, and oil-resistant transparent material (preferably explosion-proof glass in this embodiment). The exhaust piston 5 is mounted on the transparent... Inside the test chamber 3, the valve core 4 is installed in the middle of the exhaust piston 5, and the conical surface of the valve core 4 is in close contact with the seat surface of the piston. The connecting sleeve 8 is installed at the lower end of the transparent test chamber 3. The piston tension spring 7 is installed between the exhaust piston 5 and the connecting sleeve 8. The valve core tension spring 6 is installed between the valve core 4 and the connecting sleeve 8. The temperature sensor 23 and the temperature controller 24 are both installed on the injector mounting seat 2, and the temperature sensor 23 and the temperature controller 24 are both located in the annular oil chamber 11 inside the injector mounting seat 2. Several pressure sensors 25 are installed on the upper surface of the test volume chamber 14 in the middle of the transparent test chamber 3. Several high-speed cameras 26 are respectively installed at the top center of the valve core 4 and around the upper end face of the exhaust piston 5.

[0027] A fuel passage a16 is formed between the conical surface of the valve core 4 and the seat surface of the piston. Several fuel passages b18 are evenly distributed around the vertical guide section of the valve core 4. A fuel through hole is provided on the connecting sleeve 8. The fuel circulation control system is connected to the injector 1 and the fuel through hole installed on the spray test device A1.

[0028] The top of the transparent test chamber 3 is equipped with a scavenging air inlet 12 and a scavenging air outlet 13. The purging control system C is connected to the scavenging air inlet 12 and the scavenging air outlet 13.

[0029] The lower large end face of the transparent test chamber 3 is also equipped with a hydraulic oil inlet and a hydraulic oil outlet, and the pressure control system D is connected to the hydraulic oil inlet and the hydraulic oil outlet.

[0030] The fuel circulation control system includes several fuel valve switches A2, an air pump A3, a compressor A4, several fuel check valves A5, a fuel collection tank A6, a fuel delivery pump A7, a fuel storage tank A8, a fuel supply pump A9, a fuel injection pump A10, a flow meter A11, and a drive motor A12. The fuel injection pump A10 is connected to the drive motor A12 and is also connected to the injector 1 installed on the spray test device A1. The flow meter A11 is installed between the fuel injection pump A10 and the injector 1. The fuel valve switches A2 and the air pump A3 are sequentially installed on the spray test device A1. At the lower outlet, after passing through the vacuum pump A3, a first line and a second line are set up. The first line is equipped with a fuel valve switch A2, a fuel check valve A5, a compressor A4, and a fuel check valve A5 in sequence. The second line is only equipped with a valve switch. The first and second lines are combined and connected to the fuel collection tank A6. The fuel collection tank A6 is equipped with a fuel delivery pump A7, a fuel storage tank A8, and a fuel supply pump A9 in sequence. The fuel supply pump A9 is connected to the injection pump A10. The fuel circulation control system can realize the atomization test and injection performance test of low-carbon fuel, as well as the circulation and recovery of gas-liquid two-phase fuel.

[0031] The temperature control system B includes a high-temperature oil tank B1, two high-temperature oil valve switches B2, a high-temperature oil check valve B3, and a high-temperature oil pump B4. The high-temperature oil tank B1 is equipped with a heating device. The oil tank is connected to the high-temperature oil pump B4 after passing through the high-temperature oil valve switch B2. The high-temperature oil pump B4 is connected to the high-temperature oil inlet 9 on the injector mounting base 2 after passing through the high-temperature oil check valve B3. The high-temperature oil outlet 10 is connected to the oil tank after passing through the high-temperature oil valve switch B2.

[0032] The pressure control system D includes a servo oil tank D1, several hydraulic oil valve switches D2, several hydraulic oil check valves D3, and a hydraulic oil pump D4. The servo oil tank D1 is connected to the hydraulic oil pump D4 after passing through the hydraulic oil valve switches D2. The hydraulic oil pump D4 is connected to the hydraulic oil inlet on the lower end face of the transparent test chamber 3 through the hydraulic oil check valves D3. The hydraulic oil outlet is connected to the servo oil tank D1 after passing through the hydraulic oil valve switches D2. The temperature control system B and the pressure control system D are mainly used to simulate the actual working environment temperature and back pressure of the needle valve assembly on the diesel engine, and to improve the environmental adaptability of the fuel injection device through environmental testing.

[0033] The purging control system C includes a nitrogen storage device C1, several nitrogen valve switches C2, several nitrogen check valves C3, and a gas booster pump C4. Nitrogen valve switches C2 and gas booster pump C4 are sequentially installed at the rear end of the nitrogen storage device C1. Gas booster pump C4 connects to the purging inlet 12 located on the upper surface of the transparent test chamber 3 after passing through nitrogen check valves C3. Nitrogen valve switches C2 and nitrogen check valves C3 are sequentially installed at the rear end of the purging outlet 13, which then connects to the atmosphere. The purging control system C, pressure control system D, and fuel cycle control system work together to remove residual fuel within the fuel cycle control system.

[0034] The specific implementation process is as follows: When the fuel circulation control system is working, the fuel in the fuel storage tank A8 is supplied to the injection pump A10 via the low-pressure fuel supply pump A9. The drive motor A12 drives the injection pump A10 to convert and provide high-pressure fuel, which flows into the injector 1 and is sprayed into the spray test device A1 through the injector 1 to achieve atomization test. The fuel in the spray test device A1 flows through the fuel passage a16 and fuel passage b18 of the exhaust piston 5 and valve core 4 under the action of the vacuum pump A3, and flows into the pipeline of the fuel circulation control system through the fuel through hole on the connecting sleeve 8. When the fuel is liquid at normal temperature and pressure, the first line is closed and the second line is opened. Fuel flows into the fuel collection tank A6 via the second line and is then transferred to the fuel storage tank A8 via the fuel delivery pump A7. When the fuel is in a gaseous state at normal temperature and pressure, the second line is closed and the first line is opened. Fuel flows into the compressor A4 via the first line and the fuel check valve A5. After being pressurized and converted into a liquid state, fuel flows into the fuel collection tank A6 via the fuel check valve A5 and is then transferred to the fuel storage tank A8 via the fuel delivery pump A7. This completes one working cycle. The fuel supply capacity of the fuel injection pump A10 is detected by the flow meter A11 between the fuel injection pump A10 and the fuel injector 1, and the injection quantity of the fuel injector 1 is detected by the flow meter A11 before the fuel collection tank A6.

[0035] When the temperature control system B is working, the high-temperature oil in the high-temperature oil tank B1, after being heated, flows into the high-temperature oil inlet 9 on the injector mounting base 2 through the high-temperature oil pump B4, flows through the annular oil chamber 11, and flows out through the high-temperature oil outlet 10. It then flows back to the high-temperature oil tank B1 through the return oil pipeline. At the same time, the temperature sensor 23 and temperature controller 24 installed on the injector mounting base 2 can detect the temperature of the annular oil chamber 11 in real time and feed it back to the high-temperature oil tank B1, thereby controlling the temperature of the high-temperature oil in the high-temperature oil tank B1 in real time. By using the oil temperature of the annular oil chamber 11 to simulate the working temperature of the injector 1, the stability and uniformity of temperature control can be greatly improved, and the realism of the simulation can be enhanced.

[0036] When the pressure control system D is working, the purging control system C is first closed by the nitrogen valve switch C2 on the purging control system C, and the hydraulic oil valve switch D2 on the hydraulic oil return line is closed. The hydraulic oil in the servo oil tank D1 is pressurized by the hydraulic oil pump D4 and flows into the hydraulic oil inlet at the lower end of the transparent test chamber 3. The hydraulic oil flows into the hydraulic chamber 19 and pushes the exhaust piston 5 upward. At the same time, the piston spring 7 is stretched and generates a downward pulling force. When the exhaust piston 5 contacts and seals with the valve core 4, the exhaust piston 5 and the valve core 4 move upward together under the action of hydraulic pressure. Under the tension of the valve core spring 6, the valve core cone surface 15 of the valve core 4 is tightly fitted with the piston seat surface 17, increasing the air pressure in the test volume chamber 14. When the surface pressure sensor 25 detects that the pressure has reached the required pressure, the pressurization stops, and the pressurization phase ends. After the test, the hydraulic oil valve switch D2 on the hydraulic oil return line is opened, and the hydraulic oil gradually flows back into the servo oil tank D1. Under the action of the spring return force and the air pressure of the test volume chamber 14, the exhaust piston 5 and valve core 4 gradually move downward. At the same time, the nitrogen valve switch C2 on the purging control system C purging outlet 13 is gradually opened, the test volume chamber 14 is completely depressurized, and the exhaust piston 5 and valve core 4 return to their original positions. Since the height of the valve core spring 6 is slightly higher than the height of the piston spring 7, after resetting, the valve core 4 separates from the exhaust piston 5, opens the sealing surface, and forms a fuel passage. This completes one working cycle.

[0037] When the purging control system C is working, after the test, when purging is performed, nitrogen gas flows from the nitrogen storage device C1 through the nitrogen valve switch C2 and the gas booster pump C4 into the purging inlet 12 on the transparent test chamber 3, and then into the test volume chamber 14. After that, purging can be carried out in two modes: the first mode is that the nitrogen gas flows directly through the test volume chamber 14 and then flows out through the purging outlet 13 and into the atmosphere; the second mode is that the vacuum pump A3 is turned on at the same time as purging, so that the nitrogen gas flows out from the purging outlet 13 on one hand and is drawn away by the vacuum pump A3 on the other hand, which improves the efficiency and thoroughness of purging, ensures that there is no residue of harmful gases, and can also clean the residue in the pipeline. This completes one working cycle.

[0038] The above four systems can operate independently, with other systems selectively shut down, or multiple systems can be used in combination, depending on actual usage requirements. For example, fuel circulation system A can be used alone or in combination with temperature control system B and pressure control system D to more realistically simulate the working environment of injector 1; purging control system C can be used alone or in combination with pressure control system D, and in conjunction with the function of vacuum pump A3, to improve purging efficiency and enhance the safety of the test device.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A test apparatus suitable for easily vaporized fuel injection devices, characterized in that: The system includes a spray testing device, a fuel cycle control system, a temperature control system, a purging control system, and a pressure control system. All four systems are connected to the spray testing device. The outlet of the purging control system is open to the atmosphere. The fuel cycle control system enables atomization and injection performance testing of low-carbon fuels, as well as the recycling of gas-liquid two-phase fuels. The temperature and pressure control systems are primarily used to simulate the actual operating temperature and back pressure of the needle valve assembly on a diesel engine, and to improve the environmental adaptability of the fuel injection device through environmental testing. The purging control system, pressure control system, and fuel cycle control system work together to remove residual fuel within the fuel cycle control system. The spray test device includes an injector mounting base, a transparent test chamber, a valve core, an exhaust piston, a valve core tension spring, a piston tension spring, a connecting sleeve, a temperature sensor, a temperature controller, several pressure sensors, and several high-speed cameras. The injector mounting base has an injector mounting hole in the middle and is fixed to the top of the transparent test chamber. The injector mounting base has an annular oil chamber inside, with a high-temperature oil inlet and a high-temperature oil outlet at the upper end of the annular oil chamber. The exhaust piston is installed inside the transparent test chamber, and the valve core is installed in the middle of the exhaust piston, with the conical surface of the valve core fitting and sealing against the seat surface of the piston. The connecting sleeve is installed at the lower end of the transparent test chamber, and the piston tension spring is installed between the exhaust piston and the connecting sleeve. The valve core tension spring is installed between the valve core and the connecting sleeve. The temperature sensor and the temperature controller are both installed on the injector mounting base and are located in the annular oil chamber inside the injector mounting base. Several pressure sensors are installed on the upper surface of the test volume chamber in the middle of the transparent test chamber. Several high-speed cameras are respectively installed at the top center of the valve core and around the upper end face of the exhaust piston. A fuel passage is provided between the valve core and the piston seat surface, and a fuel through hole is provided on the connecting sleeve. The fuel circulation control system is connected to the injector and fuel through hole installed on the spray test device. The top of the transparent test chamber is equipped with a scavenging air inlet and a scavenging air outlet, and the purging control system is connected to the scavenging air inlet and the scavenging air outlet. The lower large end face of the transparent test chamber is also provided with a hydraulic oil inlet and a hydraulic oil outlet, and the pressure control system is connected to the hydraulic oil inlet and the hydraulic oil outlet.

2. The test equipment for an easily vaporized fuel injection device according to claim 1, characterized in that: The fuel circulation control system includes several fuel valve switches, a vacuum pump, a compressor, several fuel check valves, a fuel collection tank, a fuel delivery pump, a fuel storage tank, a fuel supply pump, an injection pump, and a drive motor. The injection pump is connected to the drive motor and is also connected to the injectors installed on the spray test device. The fuel valve switches and the vacuum pump are sequentially installed at the lower outlet of the spray test device. After passing through the vacuum pump, a first line and a second line are set. The first line is sequentially equipped with a fuel valve switch, a fuel check valve, a compressor, and a fuel check valve. The second line is only equipped with a valve switch. The first line and the second line are combined and connected to the fuel collection tank. The fuel delivery pump, the fuel storage tank, and the fuel supply pump are sequentially installed at the rear of the fuel collection tank. The fuel supply pump is connected to the injection pump.

3. The test equipment for a gasifiable fuel injection device according to claim 2, characterized in that: The temperature control system includes a high-temperature oil tank, two high-temperature oil valve switches, a high-temperature oil check valve, and a high-temperature oil pump. The high-temperature oil tank is equipped with a heating device. The oil tank is connected to the high-temperature oil pump after passing through the high-temperature oil valve switches. The high-temperature oil pump is connected to the high-temperature oil inlet on the injector mounting base after passing through the high-temperature oil check valve. The high-temperature oil outlet is connected to the oil tank after passing through the high-temperature oil valve switches.

4. The test equipment for a gasifiable fuel injection device according to claim 3, characterized in that: The purging control system includes a nitrogen storage device, several nitrogen valve switches, several nitrogen check valves, and a gas booster pump. The nitrogen storage device has nitrogen valve switches and a gas booster pump installed sequentially at its rear end. The gas booster pump is connected to the purging gas inlet located on the upper surface of the transparent test chamber after passing through a nitrogen check valve. The purging gas outlet is connected to the atmosphere after having nitrogen valve switches and a nitrogen check valve installed sequentially at its rear end.

5. The test equipment for a gasifiable fuel injection device according to claim 4, characterized in that: The pressure control system includes a servo oil tank, several hydraulic oil valve switches, several hydraulic oil check valves, and a hydraulic oil pump. The servo oil tank is connected to the hydraulic oil pump after passing through the hydraulic oil valve switches. The hydraulic oil pump is connected to the hydraulic oil inlet on the lower end face of the transparent test chamber through the hydraulic oil check valves. The hydraulic oil outlet is connected to the servo oil tank after passing through the hydraulic oil valve switches.

6. A test apparatus for a gasifiable fuel injection device according to any one of claims 2-5, characterized in that: The transparent test chamber is made of a transparent material that is pressure-resistant, temperature-resistant, and oil-resistant.

7. The test equipment for a gasifiable fuel injection device according to claim 2, characterized in that: The fuel circulation control system also includes a flow meter installed between the fuel injection pump and the fuel injector.

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