A large flow gas injection valve and method of use

Abstract

The application discloses a large-flow gas injection valve and a use method thereof. The valve comprises a filter screen assembly, an electromagnetic assembly, a sealing washer, a sealing ring, a reset spring, a magnetic isolation pad, a limiting block, an armature assembly, a valve seat, a valve body and a sealing ring. The valve is designed to have gas inlet on the top and gas outlet on the bottom. The armature assembly divides the valve into two gas chambers, forming two normally closed valves. When the electromagnetic assembly is not powered, the gas enters the gas inlet chamber through the filter screen assembly, and the armature assembly is tightly attached to the valve seat under the action of the reset spring, so that the gas inlet chamber is disconnected from the gas outlet chamber. When the electromagnetic assembly is powered, the gas enters the gas inlet chamber through the filter screen assembly, and the armature assembly moves upward under the electromagnetic action to overcome the spring force, so that the gas inlet chamber is connected to the gas outlet chamber. The valve has the characteristics of large flow, good sealing, light weight, long service life and rapid response time, and can be well matched with a certain engine gas injection system.

Description

Technical Field

[0001] This invention relates to a high-flow-rate gas injection valve and its usage method, belonging to the technical field of gas engine injection systems. Background Technology

[0002] The gas injection valve is a core component of the gas engine's injection system, used to control the engine's intake air volume; its importance is self-evident. High-flow gas injection valves combine high-frequency response, excellent sealing, large flow rate, and long service life. Current engine technology is trending towards higher horsepower; therefore, without increasing the number of injection valves, high-flow gas injection valves can provide a greater flow rate under the same gas pressure conditions, meaning the engine can output more power and provide sufficient horsepower. The injection valve measures the amount of gas injected into the engine, requiring precise control of the intake air volume. Therefore, high-frequency response and excellent sealing characteristics enable the gas injection valve to accurately control the flow rate and ensure stability. While gas injection valves are consumables, their long service life allows vehicles to operate for a longer period, avoiding frequent replacement of nozzle components, providing a better driver experience, and ultimately generating more revenue for customers.

[0003] However, current gas injection valves generally have several problems: 1. Their service life is less than 600 million cycles. 2. Their flow control accuracy is insufficient, resulting in high gas consumption and no gas savings. 3. Their flow consistency is poor, causing vehicle vibration or even stalling at idle. Summary of the Invention

[0004] The purpose of this invention is to provide a high-flow-rate gas injection valve and its usage method. This injection valve features high flow rate, good sealing performance, light weight, long service life, and rapid response time, making it well-suited for use in a certain engine's gas injection system.

[0005] The technical solution of this invention: A high-flow-rate gas injection valve includes a valve seat, an armature assembly, a return spring, a magnetic shielding pad, an electromagnetic assembly, a limiting block, and a valve body. The armature assembly, electromagnetic assembly, and valve body are all hollow structures. The return spring, magnetic shielding pad, armature assembly, limiting block, valve seat, and valve body are sequentially installed from top to bottom in the lower inner hole of the electromagnetic assembly. The valve body is fixedly connected to the bottom of the electromagnetic assembly. The armature assembly is fitted into the limiting block, and the thickness of the armature assembly is less than the thickness of the limiting block. The top of the magnetic shielding pad abuts against the bottom of the electromagnetic assembly, and the top of the limiting block abuts against the bottom of the magnetic shielding pad. The armature assembly and the bottom of the limiting block... Supported on the valve seat, the bottom of the valve seat contacts the top surface of the valve body, the bottom of the return spring abuts against the top surface of the armature assembly, the electromagnetic assembly includes a stationary iron core, a coil cover is sleeved on the stationary iron core, there is a gap between the coil cover and the lower end of the stationary iron core to form an annular structure, the lower end of the stationary iron core is provided with a longitudinal through hole connecting its central inner hole and the annular structure, the armature assembly directly below the annular structure is provided with multiple small exhaust holes, the valve seat is provided with a waist-shaped hole that penetrates its top and bottom, the waist-shaped hole is staggered with the central inner hole of the armature assembly and the small exhaust holes, when the armature assembly is pressed into contact with the valve seat, it divides the injection valve into two parts: an intake chamber and an exhaust chamber.

[0006] In the aforementioned high-flow-rate gas injection valve, the armature assembly has multiple small exhaust holes evenly distributed on it, and the bottom of the armature assembly between the small exhaust holes and its central inner hole is provided with a dovetail groove, in which fluororubber products are vulcanized; the valve seat has multiple waist-shaped holes evenly distributed on it, and the waist-shaped holes are located directly below the fluororubber products.

[0007] In the aforementioned high-flow-rate gas injection valve, the top surface of the valve seat is provided with three annular grooves, wherein the waist-shaped hole is located between the first and second annular grooves, and the protrusion between the waist-shaped hole and the two annular grooves forms two annular sealing lips. The first and second annular grooves are respectively aligned with the central inner hole of the armature assembly and the exhaust hole. The protrusion between the second and third annular grooves forms a metal limiting platform. The top surface of the metal limiting platform is lower than the top surface of the valve seat, and the outer diameter of the third annular groove is larger than the diameter of the armature assembly. When the valve seat and the armature assembly are in contact, the two annular sealing lips are in contact with the fluororubber product.

[0008] In the aforementioned high-flow-rate gas injection valve, a magnetic shielding pad is provided between the armature assembly and the coil cover.

[0009] In the aforementioned high-flow-rate gas injection valve, the flow area of ​​the openings in the electromagnetic component, armature component, valve seat, and valve body is ≥ twice the stroke flow area.

[0010] In the aforementioned high-flow-rate gas injection valve, a filter assembly is installed on the upper part of the central inner hole of the electromagnetic component, and the area of ​​a single mesh of the filter assembly is ≤20μm.

[0011] In the aforementioned high-flow-rate gas injection valve, a third sealing ring is fitted onto the outer periphery of the filter assembly.

[0012] In the aforementioned high-flow gas injection valve, a second sealing ring is fitted on the outer periphery of the valve body embedded in the inner hole of the electromagnetic component, and a first sealing ring is fitted on the outer periphery of the lower end of the valve body; a sealing retainer and a sealing gasket are fitted on the outer periphery of the lower end of the electromagnetic component, and a sealing gasket and a fourth sealing ring are fitted on the outer periphery of the upper end.

[0013] In one method of using the aforementioned high-flow-rate gas injection valve, when the electromagnetic component is energized, the armature component moves upward under the action of electromagnetic force, overcoming the return spring and gas pressure. The armature component separates from the valve seat, the injection valve opens, and gas injection begins. When the electromagnetic component is de-energized, the armature component moves downward under the action of the return spring. The armature component adheres to the valve seat, the injection valve closes, and gas injection stops.

[0014] The beneficial effects of this invention are as follows: Compared with the prior art, the high-flow-rate gas injection valve of this invention, due to its top-inlet and bottom-outlet design, uses fewer parts, is simple to assemble, requires no adjustment, has low cost, high reliability, and good vibration resistance. The injection valve adopts a short-stroke design, ensuring starting capability under low voltage and effectively reducing the valve's opening time. A magnetic isolation pad is designed between the armature assembly and the stationary iron core to control the electromagnetic force generated when the armature assembly is attracted, and to ensure that the return spring can effectively push the armature assembly to reset, effectively reducing the valve's closing time. The above high-frequency response design ensures the accuracy and stability of the gas flow control of the injection valve. The sealing structure of this injection valve is simple, using circular sealing rings to ensure the airtightness of the gas path. Simultaneously, a soft sealing pair is used to control the opening and closing of the injection valve's gas path, further improving the accuracy of the gas injection quantity. The valve seat of this injection valve is designed with a metal limiting platform, ensuring metal-to-metal contact and impact during the up-and-down movement control of the armature assembly, thereby ensuring that the rubber components in the armature assembly are always within the elastic deformation range, ensuring the long service life and stability of the injection valve. The stroke design of this injection valve is based on the thickness difference between the armature assembly and the limit block, resulting in a shorter stroke dimension chain and ensuring batch-to-batch consistency of the gas injection quantity. Simultaneously, within the allowable starting voltage range, the gas injection quantity of the injection valve can be maximized, achieving a high-flow design. Therefore, this invention features high flow rate, good sealing performance, light weight, long service life, and rapid response time, making it well-suited for use in a certain engine's gas injection system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the electromagnetic component.

[0017] Figure 3 This is a structural schematic diagram of the armature assembly;

[0018] Figure 4 This is a cross-sectional structural diagram of the armature assembly;

[0019] Figure 5 This is a schematic diagram of the valve seat structure;

[0020] Figure 6 This is a cross-sectional view of the valve seat.

[0021] Figure 7 yes Figure 6 A magnified view of a portion of the image.

[0022] Reference numerals in the attached drawings: 1-valve seat, 1-1-waist-shaped hole, 1-2-annular sealing lip, 1-3-metal limiting platform, 2-first sealing ring, 3-second sealing ring, 4-sealing gasket, 5-sealing retaining ring, 6-armature assembly, 6-1-vent hole, 6-2-fluororubber product, 7-reset spring, 8-third sealing ring, 9-filter assembly, 10-fourth sealing ring, 11-electromagnetic assembly, 11-1-coil cover, 11-2-coil assembly, 11-3-baffle, 11-4-stationary iron core, 11-5-longitudinal through hole, 12-magnetic pad, 13-limiting block, 14-valve body. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0024] An embodiment of the present invention: A high-flow-rate gas injection valve includes a valve seat 1, an armature assembly 6, a return spring 7, an electromagnetic assembly 11, a magnetic shielding pad 12, a limiting block 13, and a valve body 14. The armature assembly 6, the electromagnetic assembly 11, and the valve body 14 are all hollow structures, each having a central inner hole. The return spring 7, the magnetic shielding pad 12, the limiting block 13, the armature assembly 6, the valve seat 1, and the valve body are sequentially installed from top to bottom in the central inner hole of the lower end of the electromagnetic assembly 11. 14. The valve body 14 is fixedly connected to the bottom of the electromagnetic component 11. The armature component 6 is fitted into the limiting block 13, and the thickness of the armature component 6 is less than the thickness of the limiting block 13. The height difference between the two is the stroke of the armature component 6. The top of the magnetic shielding pad 12 abuts against the bottom of the electromagnetic component 11, and the top of the limiting block 13 abuts against the bottom of the magnetic shielding pad 12. The bottoms of the armature component 6 and the limiting block 13 are both supported on the valve seat 1. The bottom of the valve seat 1 contacts the top surface of the valve body 14, and the bottom of the return spring 7 abuts against... The armature assembly 6 is attached to the top surface and embedded in the groove on its top surface. The electromagnetic assembly 11 includes an innermost stationary iron core 11-4. A coil cover 11-1 is sleeved on the outside of the stationary iron core 11-4. The upper inner wall of the coil cover 11-1 is in contact with the upper outer periphery of the stationary iron core 11-4, but there is a gap between the lower inner wall of the coil cover 11-1 and the lower outer periphery of the stationary iron core 11-4. This gap forms an annular structure. The lower end of the stationary iron core 11-4 is provided with a longitudinal through hole 11-5. The armature assembly 6, located directly below the annular structure, is equipped with multiple exhaust holes 6-1. The valve seat 1 is equipped with a waist-shaped hole 1-1 that runs through its top and bottom. The waist-shaped hole 1-1 is staggered from the central inner hole of the armature assembly 6 and the exhaust holes 6-1. When the armature assembly 6 is pressed into contact with the valve seat 1, the injection valve is divided into two parts: an air inlet chamber and an air outlet chamber. The upper port of the electromagnetic assembly 11 is the air inlet, while the lower port of the valve body 14 is the air outlet.

[0025] The armature assembly 6 has multiple vent holes 6-1 evenly distributed on it. A dovetail groove is provided at the bottom of the armature assembly 6 between the vent holes 6-1 and its central inner hole. A fluororubber product 6-2 is vulcanized within the dovetail groove. The valve seat 1 has multiple oblong holes 1-1 evenly distributed on it, with the oblong holes 1-1 located directly below the fluororubber product 6-2. When the electromagnetic assembly 11 is not energized, the bottom surface of the armature assembly 6 is in contact with the top surface of the valve seat 1. At this time, the bottom of the fluororubber product 6-2 is in contact with the top surface of the valve seat 1, achieving a good seal and preventing air leakage.

[0026] The valve seat 1 has three annular grooves on its top surface. The waist-shaped hole 1-1 is located between the first and second annular grooves. The protrusion between the waist-shaped hole 1-1 and the two annular grooves forms two annular sealing lips 1-2. The first and second annular grooves are respectively aligned with the central inner hole of the armature assembly 6 and the vent hole 6-1. The protrusion between the second and third annular grooves forms a metal limiting platform 1-3. The top surface of the metal limiting platform 1-3 is lower than the top surface of the valve seat 1, and the outer diameter of the third annular groove is larger than the diameter of the armature assembly 6. When the valve seat 1 and the armature assembly 6 are in contact, the two annular sealing lips 1-2 are in contact with the fluororubber product 6-2.

[0027] When the electromagnetic component 11 is de-energized, the two annular sealing lips 1-2 on the valve seat 1 contact the fluororubber product 6-2 of the armature component 6, forming a soft sealing structure. Simultaneously, when the armature component 6 is pressed down, its bottom metal surface contacts and impacts the top surface of the metal limiting platform 1-3, ensuring that the fluororubber product 6-2 of the armature component 6 remains within its elastic deformation range, thus guaranteeing a long service life for the injection valve. Because the top surface of the metal limiting platform 1-3 is lower than the top surface of the valve seat 1, and the outer diameter of the third annular groove is larger than the diameter of the armature component 6, this structure ensures that when the armature component 6 resets and moves downwards, the bottom metal surface of the armature component 6 first experiences buffering action from the fluororubber product 6-2 during the contact and impact with the surface of the metal limiting platform 1-3 of the valve seat 1. This minimizes the impact wear between the bottom metal surface of the armature component 6 and the metal limiting platform 1-3 of the valve seat 1, ensuring a long service life for the components.

[0028] A magnetic shielding pad 12 is provided between the armature assembly 6 and the coil cover 11-1. The magnetic shielding pad 12 is used to control the electromagnetic force generated when the armature assembly 6 is attracted, and ensures that the reset spring 7 can effectively push the armature assembly 6 to reset, thereby effectively reducing the closing time of the injection valve.

[0029] The flow area of ​​the openings in the electromagnetic component 11, armature component 6, valve seat 1, and valve body 14 is at least twice the stroke flow area. Specifically, the flow hole of the electromagnetic component 11 consists of its central inner hole and longitudinal through hole 11-5; the flow hole of the armature component 6 consists of six evenly distributed exhaust holes 6-1 plus the central inner hole; the flow hole of the valve seat 1 is the sum of multiple oblong holes 1-1; and the valve body 14 has only one central inner hole. The stroke flow area is the annular area formed by the oblong holes 1-1 of the valve seat 1 and the stroke (the height difference between the limit block 13 and the armature component 6). Since the area of ​​the flow holes in all four components is at least twice the stroke flow area, the flow rate of the injection valve is directly determined by the stroke size during operation, and the flow rate will not be limited by the smaller area of ​​the flow hole in any component.

[0030] A filter assembly 9 is installed on the upper part of the central inner hole of the electromagnetic component 11 to filter the gas and prevent impurities in the gas from clogging the flow hole. The area of ​​a single mesh of the filter assembly 9 is ≤20μm, that is, the filtration accuracy is 20μm.

[0031] A third sealing ring 8 is fitted around the outer periphery of the filter assembly 9 to prevent gas from flowing downwards from the gap between the filter assembly 9 and the electromagnetic assembly 11.

[0032] A second sealing ring 3 is fitted around the outer periphery of the valve body 14, which is embedded in the inner hole of the electromagnetic component 11, and a first sealing ring 2 is fitted around the exposed outer periphery of the lower end of the electromagnetic component 11. A sealing retainer 5 and a sealing gasket 4 are fitted around the lower outer periphery of the electromagnetic component 11, and a sealing gasket 4 and a fourth sealing ring 10 are fitted around the upper outer periphery. This sealing structure ensures the sealing effect of the gas injection valve during use. The sealing structure of this injection valve is simple, using circular sealing rings to ensure the airtightness of the gas path.

[0033] The high-flow-rate gas injection valve of the present invention mainly includes the following components: a valve seat 1, a first sealing ring 2 of 17.4*4.41mm, a second sealing ring 3 of 18*1.8mm, a sealing gasket 4, a sealing retaining ring 5, an armature assembly 6, a return spring 7, a third sealing ring 8 of 9.7*2.6mm, a filter assembly 9, a fourth sealing ring 10 of 14.6*4.2mm, an electromagnetic assembly 11, a magnetic shielding pad 12, a limiting block 13, and a valve body 14. The contact between the valve seat 1 and the armature assembly 6 divides the entire gas injection valve into an upper intake chamber and a lower exhaust chamber. The top of the intake chamber is the intake port, and the bottom of the exhaust chamber is the exhaust port.

[0034] During assembly, first, with the air outlet end of the electromagnetic assembly 11 facing upwards, install the magnetic shielding pad 12, the limiting block 13, and the return spring 7 in sequence. Then, press the return spring 7 down through the groove of the armature assembly 6. Next, install the valve seat 1 and the 18*1.8 second sealing ring 3 in sequence. Finally, press the valve body 14 into the electromagnetic assembly 11 with an interference fit to tighten and fix the above components. (The last sentence appears to be incomplete and possibly refers to a different assembly.) Figure 1 The joint shown is welded circumferentially using laser welding to ensure that the internal components do not loosen during operation. Next, the sealing ring 5 and one sealing gasket 4 are sequentially installed on the housing of the electromagnetic assembly 11. Finally, the 17.4*4.4 first sealing ring 2 is fitted onto the annular groove of the valve body 14. Then, with the air inlet end of the electromagnetic assembly 11 facing upwards, the 9.7*2.6 third sealing ring 8 is fitted onto the annular groove of the filter assembly 9 and then installed into the electromagnetic assembly 11. Finally, one sealing gasket 4 and a 14.6*4.2 fourth sealing ring 10 are sequentially fitted onto the housing of the electromagnetic assembly 11, thus completing the entire assembly of the gas injection valve.

[0035] The injection valve of this invention adopts a top-inlet, bottom-outlet structure. The working principle is as follows: the electromagnetic component 11 and valve body 14 of the high-flow-rate gas injection valve are both hollow structures. The armature component 6 presses against the valve seat 1, dividing the injection valve into an inlet chamber and an exhaust chamber. The coil cover 11-1, coil component 11-2, baffle 11-3, stationary iron core 11-4, and armature component 6 together form an electromagnetic circuit. The electromagnetic force generated by the electromagnetic circuit, based on the on / off electrical signal input from the external excitation power supply, causes the armature component 6 to move up and down, thereby controlling the on / off action of gas injection. The gas pressure on the armature component 6 is in the same direction as the preload of the return spring 7. The fluororubber product 6-2 in the dovetail groove of the armature component 6 presses against the annular sealing lip 1-2 of the valve seat 1, sealing the valve and achieving a two-position, two-position normally closed structure. During the up-and-down movement control of the armature assembly 6, the fluororubber product 6-2 inside the dovetail groove of the armature assembly 6 contacts the annular sealing lip 1-2 of the valve seat 1, and the metal surface of the armature assembly 6 contacts the metal limiting platform 1-3 of the valve seat 1. This ensures that the fluororubber product 1-2 inside the dovetail groove of the armature assembly 6 is always within the elastic deformation range, thus effectively ensuring the long service life of the injection valve and the stability of the gas injection volume. This injection valve adopts a short-stroke design, and the stroke value is determined only by the thickness difference between the armature assembly 6 and the limiting block 13. The short-dimensional chain design ensures the consistency of gas flow in each batch of injection valves, and also ensures that the injection valve has a fairly high response speed, i.e., high-frequency response.

[0036] Working principle of the invention:

[0037] The gas injection valve is fixed to the gas injection assembly by a pressure plate and bolts, and is driven by the gas engine injection system through a socket.

[0038] This gas injection valve adopts an upper intake and lower exhaust design. Gas enters the intake chamber after being filtered by the filter assembly 9. The armature assembly 6, under the combined action of air pressure and the preload of the return spring 7, presses tightly against the valve seat 1, sealing the valve and keeping it normally closed. When the coil assembly 11-2 in the electromagnetic assembly 11 is energized, the generated electromagnetic force overcomes the combined force of air pressure and the preload of the return spring 7, causing the armature assembly 6 to move upwards and disengage from the valve seat 1. At this time, the intake chamber and exhaust chamber are connected. Gas flows from the intake port through the filter assembly 9, through the intake chamber, into the exhaust chamber, and is discharged from the outlet, keeping the injection valve open. When the coil assembly 11-2 in the electromagnetic assembly 11 is de-energized, the armature assembly 6 moves downwards under the action of the return spring 7, pressing tightly against the valve seat 1, sealing the valve and separating the intake and exhaust chambers, keeping the injection valve closed.

[0039] When the electromagnetic component 11 is not energized, the armature component 6, under the action of the return spring 7 and the gas pressure, has its bottom surface tightly fitted to the top surface of the valve seat 1. The fluororubber product 6-2 on the bottom surface of the armature component 6 blocks the oblong hole 1-1 on the valve seat 1. At this time, the armature component 6 and the valve seat 1 separate the injection valve into two independent parts: the intake chamber and the exhaust chamber. Gas cannot flow from the intake chamber into the exhaust chamber through the oblong hole 1-1. When the electromagnetic component 11 is energized, the electromagnetic component 11 generates electromagnetic force. At this time, under the action of electromagnetic force, the armature component 6 overcomes the action of the return spring 7 and the gas pressure and moves upward. Its movement stroke is the height difference between the armature component 6 and the limit block 13. At this time, the bottom surface of the armature component 6 separates from the top surface of the valve seat 1, and gas can flow into the exhaust chamber through the intake chamber. The specific flow path is as follows: Gas first enters the intake chamber through the inlet. Most of it flows through the central inner hole of the electromagnetic component 11 into the central inner hole of the armature component 6, and then into the space between the bottom of the armature component 6 and the top surface of the valve seat 1. At this point, the oblong hole 1-1 is not blocked, so the gas flows through the oblong hole 1-1 into the exhaust chamber and is finally discharged through the outlet. A portion of the gas flows through the central inner hole of the electromagnetic component 11 and the longitudinal through-hole 11-5 into the annular structure formed between the coil cover 11-1 and the stationary iron core 11-4. The upper end of the annular structure is closed, and the lower end faces the exhaust hole 6-1 of the armature component 6. Therefore, it flows through the exhaust hole 6-1 into the space between the bottom of the armature component 6 and the top surface of the valve seat 1, and then through the oblong hole 1-1 into the exhaust chamber, finally being discharged through the outlet. This structure increases the gas injection volume of the injection valve, meeting the requirements for high-flow injection.

Claims

1. A high-flow-rate gas injection valve, characterized in that: The valve assembly includes a valve seat (1), an armature assembly (6), a return spring (7), an electromagnetic assembly (11), a magnetic shielding pad (12), a limiting block (13), and a valve body (14). The armature assembly (6), the electromagnetic assembly (11), and the valve body (14) are all hollow structures. The return spring (7), the magnetic shielding pad (12), the limiting block (13), the armature assembly (6), the valve seat (1), and the valve body (14) are sequentially installed from top to bottom in the lower end inner hole of the electromagnetic assembly (11). The valve body (14) is fixedly connected to the bottom of the electromagnetic assembly (11). The armature assembly (6) is fitted into the limiting block (13), and the thickness of the armature assembly (6) is less than the thickness of the limiting block (13). The top of the magnetic shielding pad (12) abuts against the bottom of the electromagnetic assembly (11), and the top of the limiting block (13) abuts against the bottom of the magnetic shielding pad (12). The bottom of the armature assembly (6) and the limiting block (13) are supported on the valve seat. (1) The bottom of the valve seat (1) contacts the top surface of the valve body (14), the bottom of the return spring (7) abuts against the top surface of the armature assembly (6), the electromagnetic assembly (11) includes a stationary iron core (11-4), the stationary iron core (11-4) is covered with a coil cover (11-1), there is a gap between the coil cover (11-1) and the lower end of the stationary iron core (11-4) to form an annular structure, the lower end of the stationary iron core (11-4) is provided with a longitudinal through hole (11-5) to connect its central inner hole and the annular structure, the armature assembly (6) directly below the annular structure is provided with multiple exhaust holes (6-1), the valve seat (1) is provided with a waist-shaped hole (1-1) that penetrates its top and bottom, the waist-shaped hole (1-1) is staggered with the central inner hole of the armature assembly (6) and the exhaust holes (6-1), when the armature assembly (6) and the valve seat (1) are pressed together, the injection valve is divided into two parts: an intake chamber and an exhaust chamber.

2. The high-flow-rate gas injection valve according to claim 1, characterized in that: The armature assembly (6) has multiple small vent holes (6-1) evenly distributed on it. The bottom of the armature assembly (6) between the small vent holes (6-1) and its central inner hole is provided with a dovetail groove, and a fluororubber product (6-2) is vulcanized in the dovetail groove. The valve seat (1) has multiple waist-shaped holes (1-1) evenly distributed on it. The waist-shaped holes (1-1) are located directly below the fluororubber product (6-2).

3. A high-flow-rate gas injection valve according to claim 2, characterized in that: The valve seat (1) has three annular grooves on its top surface. The waist-shaped hole (1-1) is located between the first and second annular grooves. The protrusion between the waist-shaped hole (1-1) and the two annular grooves forms two annular sealing lips (1-2). The first and second annular grooves are respectively aligned with the central inner hole and the exhaust hole (6-1) of the armature assembly (6). The protrusion between the second and third annular grooves forms a metal limiting platform (1-3). The top surface of the metal limiting platform (1-3) is lower than the top surface of the valve seat (1), and the outer diameter of the third annular groove is larger than the diameter of the armature assembly (6). When the valve seat (1) and the armature assembly (6) are in contact, the two annular sealing lips (1-2) are in contact with the fluororubber product (6-2).

4. A high-flow-rate gas injection valve according to claim 1, characterized in that: A magnetic shielding pad (12) is provided between the armature assembly (6) and the coil cover (11-1).

5. A high-flow-rate gas injection valve according to claim 1, characterized in that: The flow area of ​​the openings in the electromagnetic component (11), armature component (6), valve seat (1) and valve body (14) is ≥ twice the stroke flow area.

6. A high-flow-rate gas injection valve according to claim 1, characterized in that: A filter assembly (9) is installed on the upper part of the central inner hole of the electromagnetic component (11), and the area of ​​a single mesh of the filter assembly (9) is ≤20μm.

7. A high-flow-rate gas injection valve according to claim 6, characterized in that: A third sealing ring (8) is fitted onto the outer periphery of the filter assembly (9).

8. A high-flow-rate gas injection valve according to claim 1, characterized in that: The valve body (14) is fitted with a second sealing ring (3) on the outer periphery of the inner hole of the electromagnetic component (11), and a first sealing ring (2) is fitted on the outer periphery of the lower end of the electromagnetic component (11); a sealing ring (5) and a sealing gasket (4) are fitted on the outer periphery of the lower end of the electromagnetic component (11), and a sealing gasket (4) and a fourth sealing ring (10) are fitted on the outer periphery of the upper end.

9. A method of using a high-flow-rate gas injection valve as described in any one of claims 1-8, characterized in that: When the electromagnetic component (11) is energized, the armature component (6) moves upward under the action of electromagnetic force, overcoming the return spring (7) and gas pressure. The armature component (6) separates from the valve seat (1), the injection valve opens, and the gas begins to be injected. When the electromagnetic component (11) is de-energized, the armature component (6) moves downward under the action of the return spring (7). The armature component (6) fits against the valve seat (1), the injection valve closes, and the gas stops being injected.

Images