Normally-closed electric control gulp valve

Abstract

The utility model discloses a normally closed electric control gulp valve which comprises a valve body, an air inlet pipe and an air outlet pipe, air passing channels are distributed in the valve body, the air inlet pipe and the air outlet pipe are communicated with the air passing channels in the valve body, supporting seats are further distributed at the bottom ends of the air passing channels on the inner side of the valve body, and coils wrap the outer circumferential sides of the supporting seats. A static iron core is fixed in the supporting seat, a movable iron core is further placed at the position, located at the upper end of the static iron core, of the inner side of the supporting seat, a push rod is fixed to the top end of the movable iron core, a lower sealing ring and an upper sealing ring are buckled on the push rod, the diameter of the lower sealing ring is smaller than that of the upper sealing ring, and a blocking piece is further fixed to the top end of the push rod. More than four barrel-shaped springs are arranged between the baffle plate and the inner side of the top end of the valve body; the air supply valve has the advantages that the structure is simple, air supply can be achieved through the piston in the valve body, meanwhile, accurate conveying can be achieved by controlling the air supply amount, and the whole valve body is more stable and durable in use.

Description

Technical Field

[0001] The utility model relates to the technical field of electric-controlled air-supplementing valves, in particular to a normally-closed electric-controlled air-supplementing valve. Background Art

[0002] The air supply valve is an engine after-treatment technology. Its function is to increase the oxygen content in the exhaust by adding fresh air to the exhaust gas discharged from the engine. This allows the unburned hydrocarbons and carbon monoxide in the high-temperature exhaust to be burned and oxidized again, thereby achieving the purpose of reducing exhaust pollutants. It is commonly used on motorcycles. Most of the existing air supply valves adopt a normally open structure. For example, patent number CN202020413651.4 discloses an electrically controlled air supply valve, which is an electromagnetically controlled piston and the piston is in a normally open state in the airway. This normally open valve is generally used for ordinary motorcycles. For some high-performance motorcycles with fast acceleration, it is necessary to achieve accurate air supply delivery under acceleration. Therefore, the normally open valve cannot meet this requirement. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a normally closed electrically controlled air supply valve, which has a simple structure and can realize air supply through a piston in the valve body, and at the same time can control the size of the air supply to achieve precise delivery, and the entire valve body is more stable and durable to use.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A normally closed electrically controlled air supply valve comprises a valve body, an air inlet pipe and an air outlet pipe, wherein an air passage is distributed within the valve body, the air inlet pipe and the air outlet pipe are both interconnected with the air passage within the valve body, a support seat is distributed at the bottom end of the air passage inside the valve body, a coil is wrapped around the outer circumference of the support seat, a static iron core is fixed within the support seat, a moving iron core is placed on the inner side of the support seat at the upper end of the static iron core, a push rod is fixed to the top end of the moving iron core, a lower sealing ring and an upper sealing ring are snapped on the push rod, the diameter of the lower sealing ring is smaller than the diameter of the upper sealing ring, a baffle is fixed to the top end of the push rod, and more than four barrel springs are placed between the baffle and the inner side of the top end of the valve body.

[0006] A further technical solution is that the air inlet pipe is connected to the middle end side of the valve body, and the air outlet pipe is connected to the top end side of the valve body and in the opposite direction of the air inlet pipe. After air is taken in through the air inlet pipe, the valve body realizes gas ventilation or closure, and finally discharges it from the air outlet pipe.

[0007] A further technical solution is that an ECU controller connecting seat is also connected to the valve body. After being connected to the ECU controller through the ECU controller connecting seat, the ECU controller electrically operates the coil to achieve ventilation or closure between the lower sealing ring, the upper sealing ring and the valve body. The ECU controller is an existing conventional technology for motorcycles.

[0008] A further technical solution is that the width of the connection between the air passage and the air outlet pipe is greater than the width of the connection between the air passage and the air inlet pipe, and cooperates with the lower sealing ring and the upper sealing ring to realize an upper and lower sealing structure.

[0009] A further technical solution is that a limit ring is distributed on the side ends of the push rod at the lower sealing ring and the upper sealing ring, which is used to limit the lower sealing ring and the upper sealing ring to prevent the lower sealing ring and the upper sealing ring from moving up and down on the push rod.

[0010] A further technical solution is that guide pillars are distributed on the baffle and on the inner side of the top end of the valve body, and the upper and lower ends of the barrel spring are respectively buckled on the guide pillars at the upper and lower ends to prevent the barrel spring from moving.

[0011] The beneficial effects of the utility model are as follows: the utility model is a normally closed electrically controlled air supply valve, which can form a magnetic field on the static iron core by energizing the coil, and use the principle of like repels like to drive the moving iron core to push the push rod outwards. During the pushing process, a gap is formed between the lower sealing ring, the upper sealing ring and the valve body, and gas can pass through the gap for air supply. Since the thrust of the moving iron core being repelled by the static iron core can be adjusted by the energization of the coil, the gap formed between the lower sealing ring, the upper sealing ring and the valve body can also be adjusted, so as to achieve the purpose of accurately controlling the gas flow rate. The utility model is particularly suitable for accurate air supply control of some high-performance motorcycles with relatively high requirements. At the same time, more than four barrel springs are placed between the baffle plate and the inner side of the top of the valve body, and the reciprocating up and down motion between the lower sealing ring and the upper sealing ring together with the baffle plate is smoother, less likely to come loose, and more durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a three-dimensional diagram of a normally closed electric-controlled air supply valve of the utility model;

[0014] Figure 2 This is a front view of a normally closed electric-controlled air supply valve of the utility model;

[0015] Figure 3 It is a cross-sectional view of a normally closed electrically controlled air supply valve of the utility model.

[0016] Figure 1-3 In: 1-intake pipe, 2-exhaust pipe, 3-valve body, 4-ECU controller connecting seat, 5-coil, 6-static iron core, 7-moving iron core, 8-push rod, 9-lower sealing ring, 10-upper sealing ring, 11-blocking plate, 12-guide column, 13-barrel spring, 14-air passage, 15-limiting ring. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0018] See also Figures 1 to 3 As shown, a normally closed electrically controlled air supply valve comprises a valve body 3, an air inlet pipe 1 and an air outlet pipe 2, an air passage 14 is distributed in the valve body 3, the air inlet pipe 1 and the air outlet pipe 2 are interconnected with the air passage 14 in the valve body 3, a support seat 16 is distributed at the bottom end of the air passage 14 inside the valve body 3, a coil 5 is wrapped on the outer circumference of the support seat 16, a static iron core 6 is fixed in the support seat 16, a moving iron core 7 is placed on the inner side of the support seat 16 at the upper end of the static iron core 6, a push rod 8 is fixed to the top of the moving iron core 7, a lower sealing ring 9 and an upper sealing ring 10 are buckled on the push rod 8, the diameter of the lower sealing ring 9 is smaller than the diameter of the upper sealing ring 10, a baffle 11 is fixed to the top of the push rod 8, and more than four barrel springs 13 are placed between the baffle 11 and the inner side of the top of the valve body 3.

[0019] The air inlet pipe 1 is connected to the middle end side of the valve body 3, and the air outlet pipe 2 is connected to the top end side of the valve body 3 and in the opposite direction to the air inlet pipe 1. After the air is taken in through the air inlet pipe 1, the valve body 3 realizes gas ventilation or closure, and finally discharges from the air outlet pipe 2. The valve body 3 is also connected with an ECU controller connection seat 4. After the ECU controller connection seat 4 is connected to the ECU controller, the ECU controller performs a switch electrical operation on the coil 5 to realize the ventilation or closure between the lower sealing ring 9 and the upper sealing ring 10 and the valve body 3. The ECU controller is an existing conventional technology for motorcycles. The width of the air passage 14 at the connection point with the air outlet pipe 2 is greater than the width of the air passage 14 at the connection point with the air inlet pipe 1, and cooperates with the lower sealing ring 9 and the upper sealing ring 10 to realize the upper and lower sealing structure. A limit ring 15 is also distributed on the side ends of the lower sealing ring 9 and the upper sealing ring 10 on the push rod 8, which is used to limit the lower sealing ring 9 and the upper sealing ring 10 to prevent the lower sealing ring 9 and the upper sealing ring 10 from moving up and down on the push rod 8. Guide pillars 12 are also distributed on the baffle 11 and on the inner side of the top end of the valve body 3 , and the upper and lower ends of the barrel spring 13 are respectively buckled on the guide pillars 12 at the upper and lower ends to prevent the barrel spring 13 from moving.

[0020] In this embodiment, first, the gas enters the air passage 14 on the inner side of the valve body 3 from the intake pipe 1 and is blocked by the lower sealing ring 9. At this time, if the motorcycle needs to supplement the oxygen content during the initial acceleration process, the ECU controller controls the coil 5 to be energized, so that the static iron core 6 forms a magnetic field, and uses the principle of like charges repel each other to make the moving iron core 7 move away from the static iron core 6 and move upward in the support seat 16, while driving the push rod 8 to move upward, and causing the lower sealing ring 9 and the upper sealing ring 10 on the push rod 8 to move upward as well. After the movement, the gas blocked by the lower sealing ring 9 can be discharged from the gap between the lower sealing ring 9 and the valve body 3, and the discharged gas is discharged again from the gap between the upper sealing ring 10 and the valve body 3, and finally discharged from the valve body from the outlet pipe 2. The ECU controller energizes the coil 5 and adjusts the current at the same time. The greater the current, the greater the force pushing the moving iron core 7 outwards. The gas passes through the lower sealing ring 9 and the upper sealing ring 10. The larger the gap between the lower sealing ring 9 and the upper sealing ring 10 and the valve body 3, the larger the gap between the lower sealing ring 9 and the upper sealing ring 10 and the valve body 3. Especially during the initial acceleration of the motorcycle, the engine contains more mixed gas, which will cause CO to exceed the standard, the oxygen content in the exhaust gas is lacking, and the CO and HC conversion rate of the catalyst is not high. At this time, the current flowing through the coil 5 is not large, and the gap between the lower sealing ring 9 and the upper sealing ring 10 and the valve body 3 is not large. When the acceleration reaches a certain level, the current flowing through the coil 5 is the largest, and the gap between the lower sealing ring 9 and the upper sealing ring 10 and the valve body 3 is also maximized, increasing the oxygen content in the exhaust duct, improving the conversion rate of the catalyst, reducing emissions, and accurately controlling the flow rate of the airflow. Finally, when the coil 5 is de-energized, the four barrel springs 13 act to make the lower sealing ring 9 and the upper sealing ring 10 return to their original positions and re-seal between the valve body 3, and achieve a normally closed state in the absence of electricity. The use of four barrel springs for return can make the reciprocating motion of the lower sealing ring 9 and the upper sealing ring 10 more stable, less likely to loosen and more durable.

[0021] The above embodiment is only an example of the present invention and is not intended to limit the implementation and scope of rights of the present invention. Any technical solution that is identical or equivalent to the content described in the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A normally closed electrically controlled air supply valve, comprising a valve body, an air inlet pipe and an air outlet pipe, wherein an air passage is distributed in the valve body, and the air inlet pipe and the air outlet pipe are both interconnected with the air passage in the valve body, characterized in that: A support seat is also distributed at the bottom end of the air passage inside the valve body, and a coil is wrapped on the outer circumference of the support seat. A static iron core is fixed in the support seat, and a moving iron core is placed on the inner side of the support seat at the upper end of the static iron core. A push rod is fixed to the top end of the moving iron core, and a lower sealing ring and an upper sealing ring are buckled on the push rod. The diameter of the lower sealing ring is smaller than that of the upper sealing ring. A baffle is also fixed to the top end of the push rod, and more than four barrel springs are placed between the baffle and the inner side of the top end of the valve body.

2. A normally closed electrically controlled air supply valve according to claim 1, characterized in that: The air inlet pipe is communicated with the middle end side of the valve body, and the air outlet pipe is communicated with the top end side of the valve body and in a direction opposite to the air inlet pipe.

3. A normally closed electrically controlled air supply valve according to claim 1, characterized in that: The valve body is also connected with an ECU controller connection seat.

4. A normally closed electrically controlled air supply valve according to claim 1, characterized in that: The width of the portion where the air passage is connected to the air outlet pipe is greater than the width of the portion where the air passage is connected to the air inlet pipe.

5. The normally closed electrically controlled air supply valve according to claim 1, characterized in that: Limiting rings are also distributed on the push rod at the side ends of the lower sealing ring and the upper sealing ring.

6. A normally closed electrically controlled air supply valve according to claim 1, characterized in that: Guide pillars are also distributed on the baffle and the inner side of the top end of the valve body, and the upper and lower ends of the barrel-shaped spring are respectively buckled on the guide pillars at the upper and lower ends.

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